IBM to save it's business had to merge with Red hat almost 50% 50% in 2018.
Microsoft it's security and cloud offering had to, open source it's .net framework, aquire GitHub, ditch Visual Studio fot Visual Studio Code,
ARM is eating the world, it over hauled the x86_x64 architecture, and became the Defacto architecture.
We can go on and on and on and on,that the Open Source business model, became necessary to survive in tech, not just to exist.
If you don't open it, they will eat you up.