My guess is that LLM's are bridge technology, the equivalent of cassette tapes. A big step forward, allowing things that we couldn't before. But before long they'll be surpassed by much better technology, and future generations will look back on them as primitive.

You have top scientists like LeCun arguing this position. I'd imagine all of these companies are desperately searching for the next big paradigm shift, but no one knows when that will be, and until then they need to squeeze everything they can out of LLMs.