Anyone who had a PS/2 Model 25 or 30 did, but those weren't exactly popular, and MCGA was a weird duck (supporting the 256 color 320x200 mode, and a 640x480 monochrome mode, but not the 320x200x16 EGA mode -- which VGA supported -- which made it not a compatible upgrade from EGA and unable to run lots of EGA software. If it had been EGA compatible, it might have seen more use, even though VGA was better and introduced at the same time.)