I think it's a great idea! :) [1] LLVM did the same recently (though they imported all previous messages from the mailinglist, thus making them searchable in discourse) [2 - announcement; 3 - retro], and by and large, I think it was a success. One of the comments in the retro was:
Searching the archives is much easier and have found me many old threads that I probably would have problem finding before since I haven’t been subscribed for that long.
I that it would be worth considering importing the mailing list into a separate discourse category that's then archived, but at least searchable. This would also lower the hurdle of new(er) contributors to investigate previous discussion on a given topic. [1] https://discuss.python.org/t/what-i-miss-here-coming-from-users-rust-lang-or... [2] https://blog.llvm.org/posts/2022-01-07-moving-to-discourse/ [3] https://discourse.llvm.org/t/response-to-the-move-to-discourse-retrospective...