Sure - they might be 'good enough' to build a business on. But if a competitor builds their business on top of a more accurate model, their product will work better, and they will win the market.
Yes, when i can run GPT4 in my closet, OpenAI will have GPT7 or w/e - but it doesn't change the fact that i have something useful running in my closed network and that opens up all kinds of data integration that i'm unwilling to ship to OpenAI. In that day i'll probably still use GPT7, but i'll _also_ have GPT4 running in my closet and integrating with a ton of things on my local network.
Where the big guys will have GPT-who-cares-what-version with a 100K context window.
Context size is as much of a big deal as newer generations of models imo.
Like Betamax?