Examples: There are 3 main boxes you can buy games for and none of the games are cross compatible with eachother. But there are hundreds of models of VHS players and all VHS tapes were cross compatible with the different models. Same concept for audio CDs. There was never "I wanna buy a Walkman so I can hear NSYNC"

Things are getting fragmented somewhat now with the advent of streaming. Theres a lot of exclusive content between Amazon, Hulu and Netflix.

I never understood why there was 1 main format for home video for 30 years (VHS) and meanwhile there were dozens of game formats that could only be played one specific device