On Linux there are more good terminals than anyone could possibly need. I've tried a bunch - alacritty, kitty, foot, wezterm amongst others - and they all do more than I will ever need, and all do it well. I can't objectively choose between them to be honest so I've picked one arbitrarily (and I stay with it to avoid time-wasting). In any case terminals seem to me like pretty much a solved problem. If I were talented/knowledgeable enough to think I could make a really worthwhile software innovation, I'd pick something else to work on.