The thing you are trying to speak in favor of is Apple Macintosh, with its proprietary OS long since replaced by POSIX-based and Mach-based MacOS X.
We had beautiful gaming consoles, beautiful Macintoshes, and IBM mainframes, and beautiful Burroughs and Symbolics' Lisp Machines, and the Commodore C=64s.
And yet here we are, the open ecosystem has won again, as it naturally does, based on the costs structure and information propagation.
The consoles are PCs now. The mainframe of yesteryear is now a datacenter built from souped-up PCs. The mobile phones, at first dominated by proprietary OSes, are tilting ever more towards desktop-grade OSes. And the C=64s are dead and the demoscene is delivering the eulogy.
Google itself has admitted that Android itself is a mess by lieu of the fact that they open sourced it in the first place.
Good thing Apple kept everything proprietary. There’s at least one Technology Stack I can place my trust on.