Documentation/Examples for how datasources should handle logs/metrics unification

Are there any docs/examples for how to handle the new unified querying in explore in datasources now that the exploreMode toggle is gone? Or more general writeups on the intentions/changes of this logs/metrics unification piece? e.g. switching between query editor for metrics and logs where those have different fields/targets?

As is, 7.1 just breaks log explore queries for datasources that used this toggle. Even when changing the Editor so that log results are returned, explore mode now just displays them as a table, instead of the log and graph panel that was previously available for the same results.