True to a degree. But that is a singular platform wholly controlled by the OS.

Once you put packets out into the world you're in a shared space.

I assume every conceivable variation of argument has been made both for and against Nagles at this point but it essentially revolves around a shared networking resource and what policy is in place for fair use.

Nagles fixes a particular case but interferes overall. If you fix the "particular case app" the issue goes away.