And thats the problem. Its a Mac Air laptop except in a not very portable form. Yes the screen is bigger. It's also a lot more expensive, and the processor and memory is literally no different.
I don't know why the M1 is tied to 8/16 GB memory, but it seems that there is some type of physical reason. 8 GB may be just fine, now. What I have found is that having memory can buy you a longer useful life for a desktop computer. I don't know if it will be fine when other computers get performance upgrades. And that's the crux of what I don't like: I DON'T KNOW. Because Apple isn't really explaining. So my experience from the late 70's on is that more memory has always been better. Maybe better isn't the right word- more memory has always been safer. And lacking any real information about the relationship between the M1 and memory and whether having more is useful or not I am going to go with the experience I have had- more memory can help mask the comparative slowdown of a processor that has been passed by other, newer and faster processors. Except with this iMac I can't get more memory, even if I am willing to buy it up front.
Yes I expected some type of computational performance bump. Its a desktop computer, not something that has to be easily portable. But it doesn't look like there is any performance advantage.