> There are all kinds of social media, its segmented by userbase, and culture/geography.

Your own link has Meta with 3 of the top 4 platforms. Can you really see any of the competitors overtaking them in even the medium term?

> Russia and China still use iPhones and Windows, but entirely skipped out on Facebook and Whatsapp.

China doesn't use Google either, and while they might use Windows they're staying off Azure which is where Microsoft's main business is these days.

Yes there are countries which stay off Meta. But they are just as embedded in the workings of the world as any of the companies you mentioned, probably more so. Government decisions are made by people using a mix of Apple, Google and Microsoft hardware - but all of them are communicating over WhatsApp.