This. Can we remember that Apple is making a box with fans and a motherboard? It takes them five years because they have to be inspired with some original concept that marries form and function, and then deliver something novel and daring -- not just a new computer, but a new kind of computer. This is not in customers' interest, and they are right to be upset.
It was sort of, but you also had pretty direct access to 3 PCI Express slots, 4 pretty standard drive bays (with pretty enclosures), and 4 or 8 memory slots (depending on 1 or 2 CPUs).
I'm just guessing by modular design they're talking about something much more complex and unique.
If I could upvote you 100 times I would. I just want an updated 2008 Pro. It doesn't even have to be the absolute fastest CPUs out there. It just needs to be reliable and fast and ideally quiet too.
Why? Just bring back the cheese grater case and call it a day. No pro needs or wants these fancy designs.