There is some level of analysis and feedback than an LLM could provide before a human reviews it. Even if it's just a fancy spelling checker.
Even when the tasks are not in-depth, but easier to assess, you still require a /reliable evaluator/. LLMs are not. Could they be at least employed as a virtual assistant, "parse and suggest, then I'll check"? If so, not randomly ("pick a bot"), but in full awareness of the specific instrument. That stage is not here.
I built a product that uses and LLM and I got curious about the quality of the output from different models. It took me a weekend to go from just using OpenAI's API to having Gemini, Claude, and DeepSeek all as options and a lot of that time was research on what model from each provider that I wanted to use.
It's actually pretty dangerous for the industry to have this much vertical integration. Tech could end up like the car industry.
You're right that the lock in happens because of relationships, but most big enterprise SaaS companies have relationships with multiple vendors. My company relationships with AWS, Azure, and GCP and we're currently using products from all of them in different products. Even on my specific product we're using all three.
When you've already got those relationships, the lock in is more about switching costs. The time it takes to switch, the knowledge needed to train people internally on the differences after the switch, and the actual cost of the new service vs the old one.
With AI models the time to switch from OpenAI to Gemini is negligible and there's little retraining needed. If the Google models (now or in the future) are comparable in price and do a better job than OpenAI models, I don't see where the lock in is coming from.
In other words, I believe talking about cloud market share as a whole is misleading. One cloud could have one product that's so compelling that people use that one product even when they use other clouds for more commoditized products.