Steam

Most of this already exists and they haven't taken that tack, though. SteamOS is just Arch and KDE, with access to anything Arch has access to. If you don't like that, Valve made it trivial to put another OS on the Deck, like Bazzite.

Steam Play is already a streaming technology, which works great and is free to use and has been for like at least a decade.

Steam Store is already gigantic, despite having some well funded competition who has to resort to exclusives and free game giveaways to entice users. It's already the de facto default game store for PC, and provides lots of extra features beyond just game delivery.

Most of the technology Steam uses (like Proton or GameScope or Arch) are open-source. We can (and do) fork their work for our own purposes regularly.

I don't think Valve is perfect, but I do think they value their open approach to technology. I think as long as the company is never publicly traded, I would imagine anyone who currently works at Valve would share that attitude with GabeN, otherwise I imagine they wouldn't work there long.

If they go public and have to report to shareholders, then I completely agree that the enshittification will be swift and merciless. I hope Gabe makes Valve an employee-owned co-op or something when he decides to retire. I can only imagine he has strong plans for the transition of power.