Stockfish 15 NNUE vs Stockfish 14 NNUE: What happens?

I made the  Stockfish 15 NNUE to play against the Lichess Stockfish 14 NNUE. Of course, the better engine, Stockfish 15 NNUE, played a higher accuracy, despite it being used at a lower depth, since the Lichess engine loads more quickly in the same amount of time. I used the almighty depth 30 Stockfish 15 to analyse their game. Stockfish 15 NNUE played a shocking 99.3 accuracy while Stockfish 14 NNUE, following up, played a 99.1 accuracy, and they got a draw in the end (obviously). This suggests Stockfish 15 NNUE is just slightly better, so how long will it then take for Stockfish 16, since the engine is already very good? Check out the video above to see the fascinating game!!