On Sat, 27 Jun 2020 at 18:48, Edward Diener via Boost
You have raised a bunch of hackles here. The LEWG, along with all other C++ standard committees, seems to me so much less open to debate than Boost is that it is hard to know what to say about your assertion that "This list is not very welcoming". Nor can anything ever be found out from the C++ standards committee why such and such was accepted or rejected, or what the arguments were about after the fact.
Have you tried asking a committee member, or just asking on std-discussion? It also seems to me that there tends to be a multitude of meeting trip reports that cover why such and such was accepted or rejected.
poobahs of the C++ standard committee I have often found to be largely unfriendly and closed in their determination that only they really know what is good or not for C++.
Sure; some of them need a fairly strong rationale to be convinced otherwise. :)