And that's why you go with the big guys (and pay a premium for it).
I work for a SaaS company that offers a cloud version as well as a software license. We only support the big 3 because everyone else is just keeping their systems up with chewing gum and duct tape, and it's infuriatingly inconsistent. No way of offering a reasonable SLA or for our support guys to dig into an infra problem. And this includes relatively big players like Ali, Tencent, Yandex, DO or OVH.
In the end, 95% of customers pay less if they choose the cloud version, only if you have 24/7 steady load (and a high one) will it be cheaper to pay for infra, SREs, licenses and support.