It's not a new idea really. He is talking about his stupid X brand he has been moving Twitter to for a while.

Okay.

Minebanan: now with more banan

Your error here is assuming sanity.

Both on phone and desktop I use Firefox and Edge (for different things, most work).

Because in the end a "version number" is just part of the name. You can call it anything you want.

No.

The day it was bought by Meta(Facebook) people should have moved away if you ask me.
Then again that's easy for me to say as someone who doesn't talk to anyone and so doesn't need any messenger apps. However I hear Signal is good.

I use Piped (https://github.com/TeamPiped/Piped) for youtube both on desktop and mobile through the browser, though there is also the app LibreTube which uses Piped as backend.