One issue I noted was when they advertised poorly implemented cross-platform support https://news.ycombinator.com/item?id=27079234 and then told Mac users to use other terminals.
And then another where one of their maintainers had a meltdown and his fellow dev jumped in to protect him from... a bug report on the color green https://github.com/alacritty/alacritty/issues/1561
This was a few years ago so maybe they grew up since then.
Thus far I have not been able to get my italic bold font (Cartograph CF) working on Ghostty, but this is a minor issue.
[1] https://news.ycombinator.com/item?id=42532762