Because Linux isn't a _product_, it's a piece of infrastructure. Whereas the suite of technologies you list are products, where a company gets rewarded financia

Because Linux isn't a _product_, it's a piece of infrastructure. Whereas the suite of technologies you list are products, where a company gets rewarded financially for them working well. Frankly, people aren't usually interested in the last 10% to 'make it work' if it isn't a labor of love for them OR they're getting paid to make the last 10% work. When its no longer fun, they want to move onto the next thing. A LOT of a successful software product simply isn't fun, its just work that needs to get done.