If you want impressive, you have 4-6 seperate terminal windows that take up the whole screen collectively. The laymen assume you’re hacking the NSA or something if they see that.

The only reason would be playing games online, old firmware gets locked out a couple weeks after an update releases.

But there’s also no real reason not to if you’re already running CFW. As long as Luma is reasonably up-to-date, a system update can’t break anything.