Comment by hnlmorg

I don’t think any actually believes that.

What people usually think is “resilience up to a reasonable level of risk and cost”.

Multi-cloud is simply isn’t cost beneficial for 99.9% of problems.

And for a lot of businesses who talk about risk, saying “we followed AWS best practices but AWS went down” is an acceptable answer to the question of liability.

If you are in a position where AWS going down is a reasonable risk, then you’re already in a specialised enough domain to have engineers who understand how to deliver HA across different vendors.