So long, cheesegrater

9To5Mac is reporting that Apple has confirmed the Mac Pro is no longer for sale, and indeed, although it was up yesterday , today it's gone . And are you surprised? After all, Macs have their own bespoke GPUs now, and RAM is on-die. (Glad I sprang for the 16GB option on my M1 Air &mdash; that has greatly lengthened its useful service life.) If Apple isn't shipping computers with DIMM slots…