On one hand, it seems like a bad move on any company's part not to support any segment of the market.
On the other, he's right. Apple has spent the last few years treating the Mac like an afterthought and it shows. I can't speak for the Mac Pro because I don't own one and never have, but the rest of the line-up is really sub-par. The iMac and the Mac Mini need to die. They've overstayed their welcome and no amount of slimming down is going to hide that fact. Apple needs to upend the desktop Mac offerings and have a redo. People don't buy desktop computers because they want features removed so it can be slimmer and more aesthetically pleasing. Steve Jobs called the desktop computer the truck of the computer world. Trucks do heavy work. They serve no purpose being pretty. I wish like hell Apple would dump the iMac and Mac Mini and make something modern with all the features a desktop computer user expects to have and stop worrying how much slimmer it should be. It's not a phone.
I have 4 Mac Minis, 3 of which are in use, the other is an older G4 based one
They all do the job I got them for very well.