What is your 2021 accomplishment you are most proud of? 1. Defying the government's corona-panic measures.
2. Typing the long paper on semi-infinite algebraic geometry.
3.-4. Typing the first (and the more important) half of the paper on exact DG-categories.
3.-4. New applications of contramodules to the ring and module theory (my contribution to the joint paper with J.T.)
Cf.
https://www.facebook.com/ilyaraz2/posts/1622695738067498