I have built my own launcher that consists of two rows of apps on the bottom of the screen which are auto populated with my most used apps. Additional there is a “swipe down to search” view for all other apps. Nothing else.

What can it do that macos built-in screenshots and preview can’t do?

I’m curious. What workflow do you have that requires window snapping? I’m asking because I have no use for window snapping and I’m trying to understand why people require it.