We're willing to spend money, but I've had the "datadog billing problem" before where it starts reasonable and then grows to a non-trivial percent of saas budget, and then theres a scramble to refactor. Trying to get ahead of that as the LLM logs are MUCH larger that my APM logs.
Then I'd try to integrate via a standard connector, OTel for example. Then the cost of switching is much lower. But yeah not sure myself how this will scale and how expensive or even useful it will be.