Title. I wish that there was a way to use partitioned config in tandem with config mapping, it would be a nice additional win if we could re-use a single partitioned config among multiple jobs.
adding unit tests
For consistency with tense in the other sections, avoid "would".
This is an important thing to point out, but relevant to the earlier schedule examples as well - maybe better to put it up with them?
The new graph APIs are based on the observation that a partitioned job exists independent of its schedule - i.e. it can be backfilled without its schedule - so it's confusing to attach the partitions to the schedule instead of the job. So I think it would be useful to emphasize that in some way. E.g. something like "with the new APIs, you first define a partitioning for the job, then you derive a schedule from that partitioning".
In other examples, I avoided naming things like "my_op" / "my_solid", so that the names could be the same across the new/old examples (hopefully making them easier to compare).