If well configured, mouse support can be handful when navigating code. There is a niche editor called Acme[1] that is almost "mouse-only", where even Return won't put you in the next line :)

When using Emacs, my workflow was very keyboard-centric, but sometimes navigation was a pain (even with tags and whatnot).

[1]https://www.youtube.com/watch?v=dP1xVpMPn8M