I would hope there's not much irony here at all. Signal has different priorities than Matrix. I'm sure the Signal project would like to think it can eventually grow to replace Slack, and I don't see that happening either.
I wouldn't waste time trying to be nice; I'll turn up whatever if you'll have me. Cryptographically constrained room membership in Matrix is still stuck behind consolidating on matrix-rust-sdk for E2EE, so we only have to address & audit it in one place - and progress has also been impacted by funding challenges (https://matrix.org/blog/2022/12/25/the-matrix-holiday-update... etc). So you might have to wait a while longer.