The main reason that there are two different formats is the fact that they didn't decide on a "standard" format to begin with.
Look at "betamax" & 'VHS" video tape.
VHS has always had a poorer quality picture than beta, but beat it because JVC licensed the format to anyone that wanted to make the compatible (VHS) machines. In the end, marketing set the standard for VHS format to win. (Prices for VHS machines were almost always lower than Beta)
Does anybody remember the 5-1/2" floppy?
The +- DVD formats may stay around or a while, but eventually, one may dominate and "take-over".
\"Every OS sucks\"- Three Dead Trolls in a Baggie
Old computers never die...they get upgraded.
Depending which room I\'m in......
Home built POS...
P-3 500MHz .......
But they keep workin\'.....