Marking up images, being able to blur out certain areas of an image, OCR, Visual indicator of keys pressed in screen recording mode. Cleanshot is really just a screenshot tool with some minor but useful editing tools.

OCR's built in to macOS these days. Works pretty well. Would have been a notable feature not that long ago, though, true.

Better screen recording would be nice but I do it rarely enough that Quicktime is fine. If I did it more I'd definitely have to find some other solution.

All the marking up and such—well, there are many reasons that Preview is possibly my favorite single program on Macs.