I have used ADOBE products for 13 years. 2021 is perhaps the most buggy set I have ever used. PSD crashes when trying to use the Create Normal Maps filter and Create Bump Maps filter (this is after acquiring the net-plus-ultra of all programs for this sort of convertions -- Substance Suite). Then I tried opening an In Design file I just opened 2 days ago on 2020 with my newly installed 2021 In Design. It crashed, it would not open and just hang there (luckily one of my computers still had 2020 installed, so I was able to open it and change it within 2 minutes). PSD also corrupted 5 of my recent files. Camera Raw sliders actually are annoying and Camera Raw does take a while to start, as does PSD.
Overall, if there was a way to please make all the programs usable it would be great. I have not seen any improvement on any of the programs so far and going back means re-installing all the 2020 programs, if there is a way.