The one thing I don't like about WezTerm, at least the reason why I stopped using it, is related to how it handles copying wrapped lines into the clipboard. It might just be me, and how I use tmux, but I found that when copying a line that gets wrapped, it includes a newline in the copied text. Very annoying, and I think it has to do with the interaction between WezTerm and tmux.
I don't have enough evidence to create a good bug report, and I WezTerm has its own terminal multiplexing server ("ssh domains"), so it's probably not important enough to fix anyway. I don't want to install the WezTerm multiplexing server everywhere, and tmux is pretty much on all of the places that I ssh into already.
Other than that, WezTerm is great!