Google's models are pretty good, but their API(s) and guarantees aren't. We were just told today that 'quota doesn't guarantee capacity' so basically on-demand isn't prod capable. Add to that that there isn't a second vendor source like Anthropic and OpenAI have and Google's reliability makes it a hard sell to use them unless you can back up the calls with a different model family all together.
And gemini-1.5-pro is months from depreciation and there is no production alternative. 2.0 does not pass our benchmarks and in a regulated industry we need time to move to a new modek