i haven't used paint 3d but the best thing about Paint is that it starts in less than half a second. Unless a replacement launches just as fast it's useless. Considering the bloat and lousy engineering of modern apps I'm not feeling optimistic about finding a good replacement.
Yeah :/
Print screen, load up MS Paint, paste, crop and save. Quick and easy!
Does Paint 3D load pretty fast? I don't need it to load all those fancy features like Photoshop tends to when I just want to do a quick paste/crop job.
Paint 3D loads instantly. Besides, if all you need to do is take a screenshot of a portion of the screen and save it somewhere, the snipping tool is what you should be using. Or Win + Shift + S if you've got the latest version of Windows 10.