I agree with the statement that they swapped the default storage configuration but I wouldn’t consider that an Upgrade or a Refresh to the 21 inch iMac by any means.So you agree with me that they did update the default configuration from Fusion to SSD. That's all I said had changed, I never even mentioned T2/True Tone/etc.
I can’t get into Apple’s head or think of a logical reason as to why Apple wouldn’t refresh the 21 inch iMac with the same features the 2020 27 inch iMac received unless a new “Small” iMac was to be released in the near future