Yep, understandable this is a big potential benefit. It really surprises me that no other keyboard has built in this type of functionality after all these years.

My checking on the G15 was more to help find a suitable alternative in case the AnyKey is beyond repair. (and because my G15 is no longer in active use) Unfortunately, the macros only work on the dedicated G1-G18 macro keys, and can't be assigned to the normal 104 other keys. It does offer a total of 54 usable keys, due to there also being an M1-M3 key to swap which macros are active on the keys. The software can also switch the full set of 54 mappings per application. Just not quite as convenient as Doug's current solution though.