The Squarp Pyramid has a great record mode which constantly replaces each step as you record. So you can improvise while looping over an 8 bar section and each pass of the loop replaces the previous pass on a step by step basis. When you have improvised a few passes of the loop and like what you just did, you exit record mode and the 8 bars that loop are your best take.
It's really useful for quickly making melodies and trying out ideas without stopping. And in a live performance, you are looping and trying things out, but you don't have to stick with a bad loop, as soon as you get an improv you like, you exit record and that take is the one that loops.
This would make the Keystep Pro a very unique live midi looper.