> What's the paper number? I would like to see previous version too.

The previous version is at https://lists.isocpp.org/sg7/2020/12/0127.php
I don't think we ever got to getting a number for this paper, to some
extent because
the earlier discussion of it was Dec 20th and thereabouts last year,
and some of us vanished
for a holiday straight after. :)

I would be happy to discuss this paper during the meeting. I can field questions about my big paper also, but I failed to make progress on the things I wanted to make progress on :) So it goes.