Exponential cost growth with, at best, linear improvement is not a promising business projection.
Perhaps at some point we'll say "this model is profitable and we're just gonna stick with that".
Perhaps at some point we'll say "this model is profitable and we're just gonna stick with that".
I don't follow it that closely but my perception is that's already happened. Various flavors of GPT 4 are still current products, just at lower prices.
Given that they are all constantly spending money on R&D for the next model, it does not really matter how long they get to offer some of the older models. The massive R&D spend is still incurred all the time.