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HN Buddy Daily Digest

Sunday, September 14, 2025

Hey buddy, What's up? Just wanted to give you a quick rundown of some interesting stuff I saw on Hacker News today, Sunday, September 14, 2025.

Cool Metro Station Models

First off, there was this super neat interactive map showing off models of European metro stations. It's really cool how it visualizes their size and layout. What was wild though, in the comments, people were saying how Japanese stations, like Shinjuku, are just ridiculously massive, not just for trains but they're basically huge shopping malls too. Like, you can't even tell where the station ends and the mall begins!

ChatControl and Privacy

Then there was some concerning news about ChatControl. Remember that EU thing about scanning everyone's private messages? Looks like it's still a threat, and even though some countries are blocking it, Denmark is pushing ahead. People in the comments were pretty worried about how the EU structure makes it hard for citizens to really know what's going on with these big privacy issues.

Negative Thinking and Your Brain

Here's a thought-provoking one: a study found that repetitive negative thinking is linked to cognitive decline in older adults. So, constantly dwelling on bad stuff might actually mess with your brain as you get older. Someone in the comments pointed out it's not just about trauma; humans just have a general negativity bias, which totally makes sense when you think about how much bad news we consume.

EPA and "Forever Chemicals"

Big environmental news: the EPA is trying to get rid of protections for PFAS chemicals in drinking water. These are those "forever chemicals" that never break down. Super sketchy. There was a bit of a debate in the comments about whether *all* PFAS are bad or if some, like Teflon, are okay. Still, not good news for clean water.

Betty Crocker's Shrinkflation Fail

This one was kind of funny but also annoying: Betty Crocker apparently broke their own recipes by shrinking their cake mix boxes. The boxes got smaller, but the recipes on the back still called for the old amounts of eggs and oil, so everyone's cakes were coming out wrong! Classic shrinkflation backfiring. Also, a bunch of people in the comments were complaining about how US recipes use "cups" instead of proper weights.

Plastic from Grapevines?

On a more positive note, scientists are working on something cool: turning leftover grapevine canes into a plastic-like material that actually decomposes. Imagine all the wine waste turning into eco-friendly stuff! People were cautiously optimistic in the comments, but also wary about whether big corporations would actually implement it if it costs more.

AI Babysitters

And finally, something very "now": there's a new term called "vibe coding," and apparently, it's turning senior developers into "AI babysitters." Basically, they're spending a lot of time reviewing and fixing AI-generated code. The article says it's still worth it, but it sounds like a new kind of headache. Comments were talking about how important new skills like good "prompting" are becoming, and owning the code even if AI helped generate it.

Anyway, that's the gist of it. Talk later!

All Stories from Today

Models of European metro stations (stations.albertguillaumes.cat)

ChatControl update: blocking minority held but Denmark is moving forward anyway (disobey.net)

Repetitive negative thinking associated with cognitive decline in older adults (bmcpsychiatry.biomedcentral.com)

EPA Seeks to Eliminate Critical PFAS Drinking Water Protections (earthjustice.org)

Betty Crocker broke recipes by shrinking boxes (www.cubbyathome.com)

Grapevine canes can be converted into plastic-like material that will decompose (www.sdstate.edu)

Why We Spiral (behavioralscientist.org)

Writing an operating system kernel from scratch (popovicu.com)

If my kids excel, will they move away? (jeffreybigham.com)

Bank of Thailand freezes 3M accounts, sets daily transfer limits to curb fraud (www.thaienquirer.com)

macOS Tahoe is certified Unix 03 [pdf] (www.opengroup.org)

Read to forget (mo42.bearblog.dev)

A single, 'naked' black hole confounds theories of the young cosmos (www.quantamagazine.org)

Website is hosted on a disposable vape (ewaste.fka.wtf)

OCSP Service Has Reached End of Life (letsencrypt.org)

Nicu's test website made with SVG (2007) (svg.nicubunu.ro)

Refurb Weekend: Silicon Graphics Indigo² Impact 10000 (oldvcr.blogspot.com)

SpikingBrain 7B – More efficient than classic LLMs (github.com)

Gentoo AI Policy (wiki.gentoo.org)

Cat Aquariums (cataquariums.com)

Cannabis use associated with quadrupled risk of developing type 2 diabetes (medicalxpress.com)

Fukushima insects tested for cognition (news.cnrs.fr)

How the restoration of ancient Babylon is drawing tourists back to Iraq (www.theartnewspaper.com)

Vibe coding has turned senior devs into 'AI babysitters' (techcrunch.com)

My thoughts on renting versus buying (milesbarr.me)

High Altitude Living – 8,000 ft and above (2021) (studioq.com)

How older parents divorce affects their adult children (www.bbc.com)

CVC acquires majority stake in Namecheap for $1.5B (webhosting.today)

Eye drops could replace glasses or surgery for longsightedness, study says (www.theguardian.com)

CorentinJ: Real-Time Voice Cloning (2021) (github.com)