But the core with its single thread processing and constant hangs, requiring you to repeatedly hit C-g at least once a day, is first in line for "facelift".
Just wanted to clarify, to me that's timeless. Modern would be having modern menus, pop-up configuration screen et al.. All the candy that appeals to a less experienced user, who worked with Idea, Sublime of VS code before.
But I've never really got the idea of why emacs should appeal to less experienced users. I think that's misguided: the entire point of Emacs is that you write some emacs lisp. If you're not interested in writing any lisp, then you definitely shouldn't bother with emacs (I used emacs intensively for 20 years and am the author of Emacs packages). And if you're less experienced and looking for Idea/Sublime experience then at this point in your life there's a good chance you aren't interested in writing lisp.