I was saying Tier 3, where Tier 1 ist GCP, AWS, Azure, Tier 2 Oracle, IBM and Co. and Tier 3 everyone else who is so small that he can't compete with his own API for the breadcrumbs.
I think you're mistaken.
Case in point: Scaleway, a founding member of gaia-x, does not use openstack. I know of several others who do not.