Why though? Paint is already perfect. It's ubiquitous, doesn't require a download and install (there's locked down machines), loads instantly, and the UI is incredibly simple and intuitive.
Though if I ever need "advanced" screenshotting I'll keep this in mind.
Snipping tool doesn't have shapes or text input, all the tools are freehand. I don't want to email a client with chicken scratch that looks like a child's doodle, that's unprofessional.
Though if I ever need "advanced" screenshotting I'll keep this in mind.