Yep I read about that when I first looked into exwm and it is a problem. I'm lucky though, I only really use emacs and firefox so it's not a big deal for me. I wouldn't want to be using exwm if I was doing some serious multitasking and using video editing software or something. I don't know if there are plans for a multithread rewrite of emacs but I hope it happens.
I'm going to set up lem.el at some point! I currently use elfeed to see lemmy posts from the communities I'm most interested in and firefox to comment or just browse about. I actually saw this post from inside elfeed originally.
It's just a general system setup and config tool. I'm assuming that, like me, you already know how to do all that stuff without yast but it's good for newbies and people that aren't super nerds. With all of the anti terminal stuff I always read about on the internet you'd think at least ubuntu would have their own version of it or something similar.
"YaST is a SUSE Linux Enterprise Server tool that provides a graphical interface for all essential installation and system configuration tasks. Whether you need to update packages, configure a printer, modify firewall settings, set up an FTP server, or partition a hard disk—you can do it using YaST."
But yeah, I actually hardly ever use it myself.