update pv rfc

[yaahc]

No description provided.

[teor2345]

Thanks for doing this update.

I'm a bit concerned about these changes, I think we're deleting some important questions that we'll need to answer for this design.

I also wonder if we need to add more info, based on the discussion on the previous PR.

[yaahc]

closing this PR because it will still be reachable from the original PR if anyone needs to reference the changes, but the specific changes here aren't going to merge so there's no point keeping it open.