[incrudible]

Upgrading a GPU is not much of a hassle on an ordinary desktop, you open the case and plug it in, at worst you also need to upgrade the PSU. And you do that maybe once during the lifetime of the machine.

The real problem with the Apple approach though is that the very highest end SoC gives only the performance of a much cheaper midrange discrete chip and does not support all the software. Unified memory is nice, but that does not make up for it.