Nvidia is way more than their data centre hardware - their software and research is just leagues ahead of the nearest competition, and their edge compute capabilities are going to be a rapidly growing market as derived models start getting put in products - think self-driving, robotics, machine vision, manufacturing and industrial automation, on and on.

So yes - while there are others who may yet compete in the data centre compute market, nothing else comes close to the monopolistic total vertical integration nvidia has built over the last decade.

Has Apple crashed?

At least it has an open-source capable competitor.

Surely you aren’t talking about Android as “open source”. To a first approximation no one wants a phone running only AOSP without Google’s proprietary parts.

For definitions of "no one" that include 1 billion people.

So yes, if I’m willing to go to China and use Chinese OEM customized phones with Chinese apps, I will be golden…

You're free to use the same Android that the Chinese OEMs (and Amazon) built their phones on yourself, without traveling to China. It's true that a reasonable definition of "no one" wanted Amazon's phones, but a much more lenient definition has to be used for the Chinese OEMs.

And in any other country besides China, how many of the apps that most people use don’t have a dependency on Google Play Services APIs?

Google has been moving much of what a western user considers “Android” out of the AOSP code since 2013.

No APIs have been moved out of AOSP. Google Play Services is itself built on top of AOSP. If you mean they removed the email client, that's because there are now other open source email clients that are much better.

These are the APIs that are part of Google Play Services

https://en.wikipedia.org/wiki/Google_Play_Services

you might want to recheck your measurements

I prefer to think 3DO, Atari Jaguar, Sega Saturn and Apple Pippin versus the Playstation myself.