I don't know what all NewPipe or Vanced can do, and I don't know what all YouTube's apps can do. I mostly indicated that OP's desired features were covered by the official app (without possibly downloading the audio track from a video file). I'm certainly not making an argument that NewPipe is any better or worse.

Download a playlist to listen offline without having to download each song individually/manually :)

Edit: I'm a very, very happy new pipe user, this is literally the one feature I'm waiting for. And there is a GitHub issue being worked on for it.

Support content creators?

It seems like NewPipe can't even add an option to enable ads because third-party ads are against F-Droid policy.

I think you're allowed to do third party ads (as long you can display them without running proprietrary code...).

support the creators

You mean "expose the user to emotional manipulation through ads. That is not a feature, unless it's opt-in. A donation button or something like that would be.

You opt-in when you decide you want to consume content made with effort by the creator and hosted with effort by youtube. In a lot of countries, you have an option to opt out of "emotional manupulation through ads" by subscribing to youtube premium.

You don't understand what "opt-in" means or you're pretending you don't.

lots of people pretend they don't understand in this thread