To kill celld and potential competitor early? AFAIK, there is no a single Durable Objects alternative at the moment? It's better that way I guess.
If you live in Elixir land, there's this repo from the Phoenix team, which is quite good. It has pluggable storage, and EKV (https://github.com/chrismccord/ekv) is supported as "batteries include" type storage adapter.
But again, it's very far from being a simple serverless micro server that scales infinitely and is super easy to use.
https://github.com/elyase/awesome-object-storage-native#stat...