I don't keep close tabs on the development of Stockfish. But there are always many forks around, and sooner or later the best of each will be adopted into the official main branch. 2020 as the start of the NNUE mania sounds about right. And there might be hybrid versions around, which still relied in part on hand-crafted terms, added to the NN output to get the total score. I would expect this to have some advantages for terms like Pawn structure; it will be hard for a NN to extract Pawn-Structure info from King-Piece-Square tables. But it seems the latest Stockfish relies entirely on the NN.
It would be funny to test it on positions that it has certainly not seen in its training set, like 3Q vs 7N. It might be at a total loss for what to do. (Not thet the HCE did such a good job on that...)
I don't keep close tabs on the development of Stockfish. But there are always many forks around, and sooner or later the best of each will be adopted into the official main branch. 2020 as the start of the NNUE mania sounds about right. And there might be hybrid versions around, which still relied in part on hand-crafted terms, added to the NN output to get the total score. I would expect this to have some advantages for terms like Pawn structure; it will be hard for a NN to extract Pawn-Structure info from King-Piece-Square tables. But it seems the latest Stockfish relies entirely on the NN.
It would be funny to test it on positions that it has certainly not seen in its training set, like 3Q vs 7N. It might be at a total loss for what to do. (Not thet the HCE did such a good job on that...)