If you use a cloud, you need a solution for security (ever heard of “shared responsibility”?), global delivery (a big cloud will host you all over, and this requires extra effort on your part, kind of like how having multiple rented or owned servers requires extra effort), storage (okay, I admit that S3 et al are nice and that non-big-cloud solutions are a bit lacking in this department), orchestration (the cloud handles only the lowest level — you still need to orchestrate your stuff on top of it), fixing breakage at 3 a.m. (the cloud can swap you onto a new server, subject to availability; so can a provider like Hetzner. You still need to fail over to that server successfully), patching stuff (other than firmware, the cloud does not help you here).