Although it would be nice to use a Wayland image viewer, currently all
of them (that I am aware of) suffer from anti-aliasing issues not present
in feh.
Alacritty does not support MapleMono-NF as a font, whereas kitty does.
kitty also has other nice features such as built-in windows/tabs and
image support.
Note that loading a runtime file in ~/.cache/wal is no longer necessary
since configuration is done declaratively through Nix.
Although this has some downsides, such as the lack of "live reloading"
in some applications, this "feature" wasn't present across all
applications anyway.
