We recently got the ability to run end-to-end test with real mongot binaries. The next logical step is to enable this functionality in the js-led test fixtures (contrasting with python-led resmoke fixtures). This will enable more kinds of testing, such as tests which need to coordinate specific deployments or data layouts, or those which want to configure fail points, restart the fixture, or whatever.

I think very notably, this would enable us to use a real mongot in the jstestfuzz tests, which would allow us to get some $search coverage there.