...which is a big plus for the Mac Mini and Studio - but where the iMac concept comes unstuck - you can't re-use the monitor
Yeah, a number of years ago I bought an iMac to replace a Windows system - purely for the superb screen, but sent it back as it had a hardware issue.
After my Windows setup eventually died, I bought a MacBook Pro, and when the M1 Mini arrived, bought that as my main desktop system.
What swung it was the improvement in quality, and lower costs, of HD monitors. Which meant I was able to create a Mini/27” monitor setup for less than two-thirds of a comparable iMac. It also means when the next Mini update arrives I can upgrade the Mac, without the cost of a new monitor as well. Or if I decide to upgrade the MacBook Pro instead, hook that up to the laptop.
Admittedly my HD monitor isn’t as sharp as an iMac screen, but the savings justify the compromise.