It's like fossil fuels. They took billions of years to create and centuries to consume. We can't just create more.
Another problem is that the data sets are becoming contaminated, creating a reinforcement cycle that makes LLMs trained on more recent data worse.
My thoughts are that it won't get any better with this method of just brute-forcing data into a model like everyone's been doing. There needs to be some significant scientific innovations. But all anybody is doing is throwing money at copying the major players and applying some distinguishing flavor.