@pinkforest Well I used mutt 1999-22, and email workflow is the most critical thing in my life almost ;-) But I can still try it out and comment if I have anything to say.
What made me try out aerc in the first place was this blog post: http://www.kroah.com/log/blog/2019/08/14/patch-workflow-with-mutt-2019/, i.e. if aerc made any sense to Greg K-H, it might make sense to me, as Greg is a long-time mutt user :-)
IMHO, one place where there is a lot of room for improvement, and I don’t really have a fixed choice per se, is command-line / TUI address book with vCard support, which would integrate smoothly with these popular clients:
ATM, I’m using https://github.com/lucc/khard but I do not love it particularly.