Most of what you enumerated is not a terminal emulator job.
Says who? You aren’t the arbiter of what software gets to handle each job.
Tmux does a worse job than Wezterm while being more complex, a pain in the ass to configure, and feeling less native than just using the built-in tabs and panes of my terminal. Ive also had it break the output and interfere with the keybinds of many apps. Why the hell should I install and configure an extra tool when Wezterm does what I need perfect?
And if you want image rendering, what a hell you use TUI for this?
Because I like using a TUI? I do the large majority of my work in my terminal, so why should I swap out of it to look at a picture when Wezterm does it just fine? More importantly, why do you give a fuck what tools somebody uses if they work for them?
I dont give a shit about “Unix philosophy”, Wezterm works better for me at all of these tasks than any other options.
GUI programs can also be controlled with keyboard.
I have never seen a GUI file manager with the same level of control using a keyboard as the average TUI file manager.
It will just make sure Proton tells the game your display supports HDR, you’ll probably still need to enable it in game, unless the game uses it by default.
The Wayland flag tells Proton to use Wayland natively instead of xwayland, so you do still need it.