The codebase is flexible: I could write my own frontend if I wanted or use the termwiz crate (included in the codebase) to build cli apps using the same nice layered architecture..
Another issue I have with Alacritty is that it looks ugly on Wayland (because of lack of user window decoration), I'm not sure if this has somehow solved that issue (building against gnome or something).
I love Alacritty, but for my setup it doesn't work. Looking really hard for a fast and snappy replacement.
The downside is that this requires installing the multiplexer on the remote machine, whereas iterm works with the much more prevalent tmux install.
Not sure what this means in terms of performance, I've never had any issues running remote tmux in alacritty or in iterm (via `tmux -CC`).
I don't have any use for running tmux locally, but I would sure love to be able to have actual windows for remote sessions (I use i3 and would prefer to manage all windows through that).