At my work we pay a boring, regional VPS host that is not fancy. In fact its maybe a few levels above "your 2000's web host, with a LAMP stack, a FTP login and a bad admin panel". Just a bit above that.
However, they ALWAYS pick up the phone on the 3rd ring with a capable, on call linux sysadmin with good general DB, services, networking, DNS, email knowledge.
Bonus point is that with such a simple stack you don't need to phone them often because the thing just works.
Most cloud outages are self-inflicted with the endless churn trying to reinvent things, not actual hardware failure. Just not touching the working system would boost their reliability and uptime, but then a lot of people would lose justification for their salaries so it can't happen.
However, they ALWAYS pick up the phone on the 3rd ring with a capable, on call linux sysadmin with good general DB, services, networking, DNS, email knowledge.