Good GPS for Class A motorhome

The dedicated GPS units cannot begin to keep up with the road changes the way that Google Maps and WAZE (owned by Google) can. Your dedicated GPS gets an update about 4 times per year. Google gets updated daily. While in San Marcos, TX one of the roads was shut down in one direction due to construction. Google Maps routed us around this closed road. When the road was re-opened it still tried to route us around the open road.....for about a week or 10 days. After that the routing showed the closed road as open and everything returned to normal. Not a chance that any GPS from any manufacturer could do that.