When I was there, DigitalOcean was writing a complete replacement for the Ceph S3 gateway because its performance under high concurrency was awful.

They just completely swapped out the whole service from the stack and wrote one in Go because of how much better the concurrency management was, and Ceph's team and codebase C++ was too resistant to change.

Unrelated, but one of the more annoying aspects of whatever software they use now is lack of IPv6 for the CDN layer of DigitalOcean Spaces. It means I need to proxy requests myself. :(

I'd be curious to know how versitygw compares to rclone serve S3.