Apple has a "missing middle" problem.

They have a ton of fantastic consumer-level computing devices, and one ridiculously-priced mega-computer.

But there are many of us that want something in the upper-middle: a fast computer that is upgradable, but maybe $2k and not $6k (and up).

(The iMac Pro is a dud. People that want a powerful desktop generally don't want a non-upgradable all-in-one.)