@kfitz S3 is the main thing I'd currently like to switch.
I'm not super aware of the other parts of it because I avoid it as I don't want the lock-in. (Though I have used a few bits on client projects where they've wanted it)
The Lambda stuff feels like it could enable a bunch of interesting use cases for community-scale tech to have cloud glue code to orchestrate other off-the-shelf parts. That's getting beyond your thought experiment though, I fear 😀
@kfitz I mean it's the only thing I'm currently paying AWS for, and would love to have a broadly-similarly-priced co-operative alternative to switch to 😀
I'm not hung up on the protocol per-se, it's the cost-effective binary blob (images and audio mostly) hosting that's the real feature; however there's lots of S3-compatible tooling already lying around that's easy to integrate.