I don’t mean OM gives me a choice of routes. Rather, say there are two reasonable ways to reach the destination. OM chooses route A, says turn right, ok fine, I turn right. Then after a few seconds, OM changes its mind and wants route B instead. So it says take a U turn and go this other way, oops! But if you do that, it changes its mind AGAIN, and you end up going in circles.

Weird, i've never had that happen to me!

Re downloading a subset of the maps: yes I can do that, but then I have to predict which ones I’ll need, just another thing to remember. I have all the California maps installed so that if I suddenly decide to drive to Barstow or something, I don’t have to

Ok, but what' the alternative process?

figure out which counties I’ll traverse, since they are all already downloaded. What I really want is to download ALL the maps, the whole world, might be 50GB or whatever, but that’s ok, we can buy 2TB microSD cards now. If that download was a one-time event with occasional small updates I could deal with it, but I don’t want to do the whole thing every cycle.

Sure, it's not as efficient as it could be, but maybe that will change with time. They are pretty good at adding features to it fairly regularly.