I like stories like these, but I think you just never hit a breaking point with the infra and approaches you got. You've never exceeded your ext4 volume size, so no need for object storage. You've never had a server die, so one dedi box is fine. You've never had a paying customer call you with an issue, so oncall support is not needed.
yeah, i mean i guess what i'm trying to say is that the breaking point is very far up there as computers have gotten towards breakneck speeds, especially on the technology side, for the goal being achieved. it's downright difficult to hit the limits unless you're throwing effectively a DDoS at it.
i think the big thing though is that it's a community and so people are actually willing to support that even if it means the amount of 9s of availability is slightly fewer (although in practice, many providers bust right through their "9s" SLAs without a care in the world) and given a migration from a VM provider to the dedi occurred, migrations obviously can happen if failure presents itself.
So I totally agree with your approach.