It turns out that there are a lot of gotchas to creating a clear category structure for media reviews. Well, after a year of messing around with various setups behind the scenes, I think I'm starting to get somewhere.
Migrating content between fields in Craft is not as simple as it might be. In the wake of Craft 5, I've been getting a lot of practice, and wanted to write up some of the techniques I've been using.