Apple is already in the process of closing down the Mac. As for PCs... why do you think these hardware requirements were imposed on Windows 11?

Hint: When Windows 12 comes out, everyone, or at least everyone with a newish PC, will have a TPM module that's capable of enforcing and attesting a signed-code boot path from power on all the way down to application-level code. Windows 12 will turn these machines into Xboxes that run Excel. Many computers will also have Pluton technology, which is an on-chip TPM implementation that cannot be tampered with or removed from the CPU, and which literally came from Microsoft's Xbox division.

General purpose computing isn't quite dead yet, but there's really nothing we can do for the patient. We're just waiting for it to flatline.