Sure did 30 years ago. Cartridge suspensions don't seem to last that long though, unfortunately.
Any cartridge can manage SQ or QS. The standard cartridge was NOT CD4 rated though, the MMC6000 was optional as was the decoder board.
In your opinion obviously. Not all V15's are the same BTW! They are all kinder to vinyl records though. The idea of a record sounding slightly better, but once only, didn't appeal to me that much. Fortunately vinyl problems are irrelevant since the invention of CD.