I am exactly the kind of user who Garmin is targeting with Enduro. Initially I was very intrigued by Enduro, yet I think Garmin has made a mistake by not including maps. Training for ultrarunning involves very long runs in remote areas on trails where navigation is an essential part of experience.
Without maps, by relying only on turn-by-turn directions, navigation is much less reliable. Turn-by-turn directions simply don't work on trails because there are often trail junctions at odd angles that aren't detected as turns. At the same time the watch produces a lot of useless turn notifications at every sharp bend of trail where there are no actual turns. Maps are pretty much required to see the course relative to other terrain features - other trails, creeks, lakes, summits, etc.
So I wonder what was the rationale for excluding maps?