Doesn't it feel sketchy to run a terminal that isn't even packaged by Debian? I run a few non-packaged things, but I don't want my terminal, or shell, or kernel to be "some code from a some person on github".
[1]: Dated via the dev's release blog post: https://jwilm.io/blog/announcing-alacritty/
In addition, at some point I had a look, and the former terminal I used to use (termite[0]) deprecated itself in favour of alacritty as well so I can't even switch back (I mean I could, but it's now unmaintained.)
As you got systemd and non systemd distros, Debian is in this a distro w/o alacrity.
I don't think this would necessarily be true with other Linux based operating systems (perhaps RHEL), but certainly is true in this case.