If you want polymorphism which looks more like what you’re describing, you can put trait bounds on parameters instead of a type and it will accept any parameter that implement those traits. E.g. If you want to accept anything that can be turned into an owned string with “.into()” you type an argument with “impl Into<String>”. Another common one is “impl AsRef<Path>” to accept a path, path reference, PathBuf etc.

Something like this? https://play.rust-lang.org/?version=stable&amp;mode=debug&amp;edition=2021&amp;gist=949cec265c832a9825948acdf41e13e4

I didn’t see anyone posting wezterm yet https://wezfurlong.org/wezterm/index.html

The Proton offering is a great alternative imo