I use Alacritty as well and for me I care about having a low latency of response when I press Ctrl-C after I accidentally cat a huge text file. I want my key press to be acted upon immediately and that I want the pages and pages of text to finish rendering quickly so I can get back to my shell prompt.
When I did a quick test two years ago, Alacritty outperformed Gnome Terminal. Looking forward to trying this again when I update my system.