[halcy0n]

There is a whole subculture of artists who use MS paint as a means to make a specific form of art. Also this actually saddens me that sure there could be other low budget tools but without one baked into the OS think about the kid bored in school who can no longer stumble into mspaint and start doodling in class.

[matteocontrini]

Paint 3D is now preinstalled on Windows 10

[ygra]

To add to this, pixel-precise drawing is still available in Paint 3D, so "the specific art style" mentioned by the GP is still possible there. Heck, some things that cater to this style are even easier in Paint 3D than in Paint.