When I see that side-view/profile angle, I imagine a modestly wedge-shaped back instead with a removable panel into which one could insert 2 or maybe 4 m.2 storage sticks for "as we need it" SSD expansion... like how former iMacs offered a removable panel to insert our own, third-party RAM. Yes, I know Apple would rather sell their high-profit internal storage at point of sale, but one can dream that they prioritize consumer utility/value instead of their own motive$$$.
And I also recall some early iMacs (post tubes) where only a few screws could remove the entire back, making upgrading anything inside somewhat easy. Since the screen in these Silicon iMacs will likely outlast the tech guts by a LONG time, wouldn't it be nice to be able to remove the back and swap out the tech guts to continue using the rest when Apple decides to obsolete or vintage those tech guts with macOS upgrades? This seems like a much better option than the whole "throw baby out with the bathwater" approach when any one part is made obsolete and/or fails... and a perfectly good monitor remains. It would certainly better fit Apple's environmental spin. If not DIY, let us bring a vintaging iMac into an Apple store, pay for the new guts and have the store do the swap. But, of course, there is much more profit in "throw baby out with the bathwater."