After a long hunt for my wire framing, prototyping and design tools I discovered sketch by accident. I've been using it for number of years and I use it almost daily. I like this app and it has potential. The only downside I feel is their price model which is almost becomes like yearly subscription pricing plan. I'm not big fan of subscription pricing. This is the reason I'm still stuck with very old version of sketch. I've been resisting to switch to Figma from sketch but it seems sooner rather than later I'll have to switch to Figma as all my UI designers use it.
I always miss some sort of freehand tool for quick drawing, like adding comments or highlighting. It is not for UI design work but for providing feedback on screenshots which I use sketch to do.