>>105985509 (OP)rather, ask yourself: why don't more software companies develop for linux systems?
the answer is: money. most people use a windows PC or Mac and that's where the money is. Say about Valve what you want, but they are making Linux a viable system for a lot of people who just want to watch youtube and play vidya aka a large group of PC users
it's just that Microsoft got in it's foot into companies pretty early. people that have to use Windows at work would rather get a windows PC, because that's what's familiar to them.