Linux

And the FOSS system seems to be collapsing right now for the same reason that anarcho-communism only works short-term until someone sees commercial value in it and abuses the system to the limit.

• Big corporations initially providing exceptional services based on FOSS and after a while use their market share to excert undue control about the system (see e.g. RedHat, Ubuntu, Chrome, Android, ...)
• Big corporations taking FLOSS, rebranding it and hiding it below their frontend, so that nobody can interact with or directly use the FLOSS part (e.g. iOS, any car manufacturer, ...)
• Big and small companies just using GPL (or similar) software and not sharing their modifications when asked (e.g. basically any embedded systems, many Android manufacturers, RedHat, ...)
• Big corporations using infrastructure FOSS without giving anything back (e.g. OpenSSL, which before Heartbleed was developed and maintained by a single guy with barely enough funding to stay alive, while it was used by millions of projects with a combined user base of billions of users)

The old embrace-extend-extinguish playbook is everywhere.

And so it's no surprise that many well-known FOSS developers are advocating for some kind of post-FOSS system that forces commercial users to pay for their usage of the software.

Considering how borderline impossible it is for some software developer to successfully sue a company to comply with GPL, I can't really see such a post-FOSS system work well.