Open source is knowledge, if you open source documentation about proprietary architectures in depth and other knowledge like proprietary medicine and chemicals and mining tech and those chip manufacturing machines and etc, then everything will be open source, open source is basically open knowledge for everyone, maintaining and building (compiling) and developing (forking) is still up to community and that freedom is blessing of open source, since if some influential guy decides to shut down some platform/manufacture/business it can be forked by ANYONE and enshittification would be impossible in the long run