And how do I tell may client to use only a specific server?

The only alternative that’s FOSS and not centrally controlled is Matrix

That's not true, there is also XMPP which is lighter and far more decentralized than Matrix

I don't know, I use android

How this will impact piracy?

I'll look into that, thanks!

Also i use AIMP on android

SMPlayer will do that, althought i am not sure about the playlist thing but it will defenitely remember where you where in the file

Good bot

I use Lollypop for music, well in reality i just use MPV for that too lol but i downloaded that "just in case"

There are a lot of cases that having different resolution can cause issues. I am glad you didn't have problem but this doesn't apply for everyone unfortunately

I think everyone can put a false description. Only way to know is to audit the code. Unfortunately i'm not able to do that

If i remember correctly HDDs have a lifespan of about 50 years, while SSDs only 10. So I'd suggest you to buy an HDD