Why Stockfish 16.1 is not here and why we don't have an interesting move classification (!?)?
The site does have 16.1

It's pretty hard to quantify a move as interesting algorithmically using engine evaluations, so that's unlikely something that would ever be added. Interesting isn't even a classification that many people would agree on as a definition.
Where is Stockfish 16.1?
Why Stockfish 16.1 is not here and why we don't have an interesting move classification (!?)?