Ceph is extraordinarily complicated to run correctly. The docs aren't great and commercial support is pretty mediocre.
It's an amazing piece of software, but takes a great deal of engineering to get right. Most folks won't invest that much engineering into their storage.
This is why Providers like EMC and NetApp can extract 10x the cost of the raw storage from enterprises.
The RedHat ceph docs are great and open to everyone for free.
The RedHat commercial support has been pretty good for us. We presented them with 2 bugs, and they addressed both. One took a few weeks but one only took a few hours to get a hotfix started.
EMC storage is absolute trash post Dell merger. Pure 100% dumpsterfire. Their customers know their systems better than they do. It's pathetic.
It's an amazing piece of software, but takes a great deal of engineering to get right. Most folks won't invest that much engineering into their storage.
This is why Providers like EMC and NetApp can extract 10x the cost of the raw storage from enterprises.