I've only experienced real issues when out of network coverage for a long time.
I make sure I download the areas I'll visit especially if the network coverage is spotty.
My Ford sync 3 amd my old Tundra with a Kenwood AA radio bot work fine out of service as long as I have the maps downloaded
I disagree, most of these subscriptions options are all built in and "enabled" if bought. There ain't no car manufacturers looking to reduce their car prices for us. It's profit above everything