Personally I've been using gnome-terminal for quite a while and was fairly happy except that I needed to maintain gnome-terminal and libvte patches to get notification support. Having some sort of notification when a long-running command completes is very important to my productivity.
I've been using Konsole but not fully happy.
No hyperlink support.
Selection is lost when my prompt updates (I have the time so that I know when I have started commands).
I've been looking at other options but none-of them feel quite right.
Alacritty:
No unlimited scrollback.
Kitty:
Selection bug with updating prompt.
No unlimited scrollback.
Wezterm:
No unlimited scrollback.
Terminator:
Has this terminal group bar that I can't get rid of.
No notification support.
I realize that I am probably going to have to make a compromise (probably just go back to gnome-terminal with patches) but I figured it would be interesting to see what everyone else was using and make sure I didn't miss something.
To me the important features are:
Unlimited scrollback.
Notification support (ideally with the 777 Notify command, but if the terminal bell can make a notification that is fine).
Clean UI. (I don't use tabs so need to be able to hide the tab bar)
I'm pretty sure you can set alacritty and kitty to a ridiculously high number of scrollback lines, like at least several trillion. I think I just add 4 zeros on to the default and I've never had enough output for it to run out of scrollback. At some point you're going to run out of ram or storage for storing scrollback so you can't realistically have unlimited scrollback without doing something ridiculous.