Remember Eucalyptus? Was lead by the former CEO of MySQL. Built an open-source project that attempted to be compatible with AWS. The project is still alive.
Looks like the last release was in 2017. Eight years of releases is a relatively good run. May be of interest to those like Oxide, who are considering similar paths, with the added complexity of firmware, BMCs, roots of trust and OCP-style hardware.
https://en.m.wikipedia.org/wiki/Eucalyptus_(software)