I have lived quite happily, on pretty much only open source for over 12 years now. Professionally and at home (longer at home). Debian I put with Wikipedia as an example of what humans can be.
There is no gate keepers in who can do what where. Only on who will accept the patches. Projects fork for all kinds of reasons, though even Google failed to fork the Linux kernel. If there is some good patch to extend the filename limit, it will get in. Enough pressure and maybe the core team of that subsystem will do it.
Open source already won I'm affriad. Most of the internet, IoT to super computers, runs open source. Has been that way for a while. If you use Windows, fine, but it is just a consumer end node OS for muggels. 😉
If you setup a new install, and say you want encryption, LUKS is what you get.
See things is, I'm a Brit. Water and rail are going to be brought back under groverment control because running them privately has failed. Buses are another one where when the local government has taken back over, services have improved. Partly because they are run providing a service, not a profit.
Certain bit of society's infrastructure is better run at a loss for the better running of the wider economy. If every bit is run at a profit, the whole can be less profitable. Most countries don't have all private road system. France has lot of private motorways, which are strangely empty, because the local avoid them because of cost. Like the M6 Toll in the UK.