@George Kaye did you mean to post your response on another thread?

Getting back on-topic... Today I received a marketing message from Roland in my personal email advertising additional styles for the FP-E50. When I clicked the embedded link, it took me to a Roland Cloud page. There, I learned that the FP-E50 seems to have style compatibility with legacy Roland arrangers! This supports my earlier conjecture that it has "real" Roland Operating System DNA. I also wasn't surprised to learn that the downloadable styles for the E-X50 and E-X30 are NOT compatible with other Roland arrangers (probably because they borrow from an entry-level Yamaha OS.)

So in the FP-E50 we have the first new "real" Roland arranger product since 2015. What will Roland Japan do for an encore?