professionals don't get tricked into thinking a platform is ready for production use
If you don't have SLOs and SLAs, then you get what you get, essentially. Even a company with a great reputation can completely reverse course with a single bad incident, and you get nothing in return if there's not a contract.
Honestly, if you are a small fish to AWS... what is an SLA?
They can trot out a low level person to stall you with questions, or an AI question generator that maximizes the amount of time you waste on your end, and call that "SLA met".
And even if they DON'T meet the SLA on occasion, you built your stack on AWS. You are laying in the bed you made.
SO, what, AWS throws some free credits (that their 30-40% margin easily absorbs)?
The only big stick in these types of things is having dual-cloud capability, where you can move your service quickly from one cloud to the other. Stateless API servers? Maybe. Database servers? ouch. Cassandra could reliably span two clouds, man would AWS kill you on their ludicrously overpriced network costs.
Has anyone does Postgres replication across providers as a useful production system? Doubt it.
If you don't have SLOs and SLAs, then you get what you get, essentially. Even a company with a great reputation can completely reverse course with a single bad incident, and you get nothing in return if there's not a contract.