I was on Arch for 14 years, but I’ve started moving to Tumbleweed. I don’t have the time to configure everything now, but this gives me near enough to bleeding edge.

Your fire alarms most likely have a CO detector, not a CO2 detector. I don’t really know the point of a CO2 detector, though, so I agree with you on everything. Just get a few more indoor plants if CO2 is a concern.

Maybe decades ago, but not now.

I use KeepassXC on my computer and Keepass2Android on my phone. Passkeys work fine and are synchronized across my Synology.

I started with Ubuntu back when you could put in your parent’s home address and they sent you free CDs. I’m on Arch (since about 2010), and I can’t change.