Given the Herculean efforts (and superb results) of Rosetta and Rosetta 2, I'm still appalled that Apple couldn't have found a way to keep running 32 bit apps, even at a performance hit through some level of emulation or containerization.

In addition to countless classic games being dead in the water, my Mom was completely blindsided by the change, suddenly losing access to several old-but-trusted productivity apps, and she had to scramble to find replacements. I don't recall there even being a generic warning during the upgrade process, let alone "the following apps will no longer function: [...]; do you wish to proceed?"