I currently run an old Nuvi 1450/1490, which has a number of maps and data sets installed, including:
- CN Aus/NZ
- OzTopo
- GArmin Topo
- My own speed camera files
- My own waypoints/location files

The speed camera and waypoint files I make myself and upload using POI Loader. The maps I get from various 'sources', none being Garmin themselves.

I would like to get a newer model GPS which is faster and has a larger screen, but am wary of the issues protection and GMA measures (and possibly file system changes?) that were brought in ages back - which is why I have never upgraded.

Are these issues still concerns for current models, or can my current cache of maps and data sets be used on newer models?