I've yet to be convinced all of this effort is worth it, compared to the ease of using a repository pattern and just using a fake for tests.
And, like, I don't think we shouldn't be doing these efforts, I guess, as they may still pay technical advancement dividends down the road or help with cheaper, faster QA envs, all-in-one e2e envs, etc... but for the unit test and service test layers, those bottom several layers of your testing pyramid, fakes for your repository interfaces is so much easier and orders of magnitude cheaper.
And, like, I don't think we shouldn't be doing these efforts, I guess, as they may still pay technical advancement dividends down the road or help with cheaper, faster QA envs, all-in-one e2e envs, etc... but for the unit test and service test layers, those bottom several layers of your testing pyramid, fakes for your repository interfaces is so much easier and orders of magnitude cheaper.