Is there going to be any reason for me to get a radio with nav built in if I can just use Google Maps.
I considered one with built in NAV. The unit it replaced had it. But it costs hundreds of dollars a year to keep the maps and POI's up to date, and even the newest update is a year or two out of date by the time it is released. Google is waaaaayyyy better and far more up to date.
I have never had a signal loss for so long that I would have gotten lost (unless you deviated from the currently set route and had to wait for a signal to re-route), and I live in the middle of the damn forest and am on T-Mobile. Still, I have CoPilot on my phone with 'no data required maps and routing' just in case (think it was $20 or something). It is very capable but I have never had to use it.