Ha, wow I had never seen this before and it is very similar.

I suppose the main difference is

- As far as I can see, Stubby doesn't provide CDCs-like functionality and MJ does. The idea of this is you can make sure your fake endpoints are valid. A common problem with mocks is that they go out of sync with a real server so your build is green, but it shouldn't be

- No flaky functionality

- Doesn't require any particular system dependencies (npm, maven or anything like that)