I think this change is good to Pulsar functionality, and more important - to Pulsar developers and even users trying to figure out the code.

I read the background reading blog linked (from the section you mentioned), and the text in the PIP. I can honestly say I understand only 30% of how the solution would really look like, so without prior background it's hard for me personally to give proper feedback. I usually stay clear of reading PRs implementing PIP as they harder to read and take more time than PIPs :) so I try to make sure I can understand what I can from the PIP.

I truly appreciate how this overall addition to Pulsar raises the bar for Pulsar 💪

Approved as PIP voted passed - https://lists.apache.org/thread/2s9hkmxovz1gop2031wk4v8skm270zh6

Thanks for driving this effort @lhotari!