I never bought into the All-in-one-PC idea. That's why my Apple experience started with a Hackintosh. No need for a glossy 5k display with a crappy camera and mediocre sound. A non-glare 4k BenQ with a Logitech Brio 4k camera (that is even able to do Windows Hello Face ID) and Bose sound boxes is more like me (and still cheaper than the Studio display with the only difference of being 5k vs 4k and center stage functionality/spatial audio on the Studio display - none of that has much value for me, the KVM function of the BenQ has more). Having the computer decoupled from any peripheral prolongs the lifetime of those while giving me the option to upgrade independently. Furthermore having a display without the option to adjust tilt, height and orientation doesn't cut it at all. Every two years my employeer asks me to do online reeducation on various topics, one if it being ergonomy. The iMac lacks everything needed to support an ergonomical setup.
The iMac was bad design, its value for Apple was just the style - if anyone used an iMac, its form made sure everyone was noticing it. It is good that it is gone. No more excuses for Apple needed in designer classrooms. How can a product be bad design when it is commercially successful? Well, Apple proved, it can. Like dark mode in general.
However it is true that it is a mistake that Apple does offer the M1 pro in Macbook Pros only. I think they are not serving a huge part of the possible market this way. A Mac mini with a M1 pro, which means options for more RAM, more tb connections and more displays, that is something to wait for.