CPUs are the same with real performance needed a new chipset and motherboard. At that point you are replacing the whole system.

I find the quoted statement untrue. You still have all peripherals, including the screen, the PSU, and the case.

You can replace components as and when it becomes necessary.

You can add up hard drives, instead of replacing a smaller one with a larger one.

Desktop mobos are usually more upgradeable with RAM than laptops.

There’s probably more arguments that speak against the gist of this article.