Hello Tom,
but that is only the case if you also use the MRA app.
I deliberately continue to use my zumo xt, at least on longer trips, even though I have already tried a few smartphone-based navigation apps.
In Germany anyway, and especially here on the remote islands, there are always areas without decent network coverage and I haven't found the outdoor smartphone for me yet.
The weather here is probably better than in Germany at the moment. High fog in the morning, sometimes light rain, but it doesn't last long and between 12 and 16 degrees. So summer by local standards.
Greetings
Thomas