Meta interferes with some of my vim bindings, though, as well as some readline bindings (`alt-f`, `alt-b`). I like using the system key because it's essentially unused in Alacritty and it provides a clean separation between tools.

And actually, I didn't mention that my VinTmuxNav commands are bound to `alt-j` and the like so that I can still use `ctrl-h` and `ctrl-l` on the command line. [EDIT: ...and then alacritty binds `cmd-j` and friends to the meta version when inside vim]

And yes, can confirm you do need to make Alt be Esc+ in iTerm!