> Those smartphones, cars, etc. are all made by a relatively small number of suppliers on

And Windows doesn't run at all on 99.99999% of them, and never will.

> Buy a consumer Walmart PC running Windows and it is expected to be plug and play with nearly any graphics card, USB scanner, printer, etc

There isn't a single graphics card you can buy in a store today that doesn't work with Linux. In the mid-2000s there were USB scanners and printers that didn't work with Linux but now finding a USB scanner or printer that doesn't work with Linux is extremely rare.

This argument about compatibility is an extremely stupid argument.