Only tangentially related, but I'm always fascinated that mailing lists are still a thing in 2025.
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It's rhetorical of course, it's because their users are completely blind to their pitfalls after decades of use, and it seems that generation-renewal is not a priority.
Discord servers and other contemporary solutions are much worse on the long run, but it does not matter. Software is like startups, long term is not a goal when you are not sure to survive (or in that case, being used and having contributors) next week.
As far as contributing go, coding a bug fix or a new features takes way longer than figuring how sending patch over mail works (for the extreme case) and you only need to do it once.
And opensource is not a popularity contest.