I think it says more about the state of open source distributed file systems than the cloud per se. Ceph and Gluster are not the best examples of these, though

I think it says more about the state of open source distributed file systems than the cloud per se. Ceph and Gluster are not the best examples of these, though Lustre is awful too. I'm paid to dig into these at depth and each is like some combination of religion and dumpster fire. Understand that Red Hat (and Intel in the Lustre case) wants support, training and professional services revenue. Outside of their paid domains, it's truly commerce with demons but inside it's not much better. BeeGFS is the only nominally open source one that I'd think about trusting my data too. And no, I don't work for them or am compensated in any way for recommendations.