They actually have some features that aren't available in other clouds (well, AWS/GCP/AZ) -- if we weren't so locked into AWS, we might've tried them for that reason. We wanted to know if we could run our own hypervisor in their cloud and access VT-x instructions. (And there were other companies at their talk that were definitely hitting up sales for trials; the "baremetal" aspect intrigued a lot of people with compliance reqs or complex cloud appliances. Dedicated bandwidth was another.)

I think later clouds have advantages and not just missing/worse features -- they got to design their architecture after seeing others try, and definitely learned some lessons.