Because they are hitting Compute Efficient Frontier. Models can't be much bigger, there is no more original data on the internet, so all models will eventually

Because they are hitting Compute Efficient Frontier. Models can't be much bigger, there is no more original data on the internet, so all models will eventually cluster to similar CEF as was described in this video 10 months ago https://www.youtube.com/watch?v=5eqRuVp65eY https://www.youtube.com/watch?v=5eqRuVp65eY