Does NOT delete any files that were written to, for example, ~/.local by anything ran in the dev shell.

Any files created by programs running in the dev environments will remain.

NixOS containers could do what OP's asking for, but it'll be trickier with just nix (on other distro). It'll handle build dependencies and such, but you'll still need to keep your home or other directories clean some other way.

Russia has already been thoroughly defeated. The invasion has been such a catastrophic failure that I don't see how "escalate things again in a few years to come" is even remotely plausible.

How does Tor help ssh behind NAT?

Smartphone use is certainly something that should be decided on local level. Global bans only make sense for universal human rights, or things like climate change that have global effects.

Not open source.

Can't customise my feed in any way. It's full of creators I don't like who post a lot of videos.

The issue is, social change should be driven by the locals, through civil organizations, grassroots movements, education, etc. If foreigners want to help, they can help local LGBT groups with support, know-how, expertise.

If, instead, you just go to a foreign country, tell people there how backwards and evil their society is, and demand they change it, at best you'll be wasting your time, and if you're high-profile enough, boost local reactionary sentiment.

Indeed, most can speak both. I'm referring to first language.

It was before the big war from 2022, but the was in Donbas was happening at the time. Unfortunately, I don't think it's possible to reverse this trend while the war's still ongoing.