Superfeedr also seems completely unmaintained since Medium bought them. The blog is dry, other feed-related projects are frozen, they still don't support newer

Superfeedr also seems completely unmaintained since Medium bought them. The blog is dry, other feed-related projects are frozen, they still don't support newer WebSub standards and the offical Medium hub for Medium blogs doesn't send updates. I suspect that Medium doesn't care about feeds anymore now that they are big so they are doing just enough to keep the current service running. I wouldn't want to build a service on top of them. But I guess if it does shut down switching to polling youself wouldn't be the hardest thing to do.