Dunno, I've been trying it off and on since it was first released in like 2018. I don't theres any particularly noticeable changes from 6 months ago specifically.
I also used Emacs way back in the day but have been Vim/Neovim for the last 5 years or so. But I recently started a new Lisp project so revisited Lem, actually set it up the way I want (with LazyVim-like bindings), and found with my changes and comfort hacking on it (it's all Common Lisp top to bottom so it's easy to change) that it can replace LazyVim for me now. Just using the ncurses front end BTW.