I’m also in the “I’ve never wished my terminal were faster” camp. Certainly I’ve wished the things I run in it were faster, but that’s a different story.
I split my time between macOS and ChromeOS, and I find it easier to just stick to what’s built in. The things that add friction to my development experience are not waiting for tty characters to draw, they are hopping around between the mess of tabs and windows between the browser, VS Code, and terminal sessions, all tied for a distant third; in second place, waiting for builds; and by far and away #1, trying to understand how this goddamn maze of abstraction and indirection and microservices and frameworks works so I can figure out where to actually put my code.