For .de you don't need any of that domain privacy stuff. .de domains don't reveal anything over whois except the company you registered the domain at (and DNS servers, but domains are useless without that). You have to do some special request to get more than that. Idk how hard it is to make such a request though
Many developers use Linux, so Jetbrains makes sure all their IDEs work on it.
I'm pretty sure in general there are more development tools that don't work on windows (or only work through WSL, which is Linux), than development tools that don't work on Linux.
The Wikipedia page doesn't sound too bad, but IANAL.The regulation linked from the wiki article only includes the word "age" three times and actually states:
[...] this prohibition should not lead the provider of the online platform to maintain, acquire or process more personal data than it already has in order to assess if the recipient of the service is a minor. Thus, this obligation should not incentivize providers of online platforms to collect the age of the recipient of the service prior to their use.
Haven't looked at it any more than that, but it sounds like it's already been in effect for ~2 years?
That's VSCode