So what are all of these agentic based strategies going to do once the infinite money spigot of investment into AI ends and they need to start charging prices that actually make a profit?

I get that most of the cost is in training and not inference, but I don’t see how models stay useful once the worlds software updates in a few months post training since the models can’t learn without said training.

Are we just going to have shops do the equivalent of old COBOL shops where everything is built to one years standards and the main language/framework is mostly set in stone?