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Nissan To Deactivate Key Features From Early EVs
(www.carscoops.com)
This is a most excellent place for technology news and articles.
What you say about the subscription model is true, but I don't think this is the case. They simply went with the network that at the time had the biggest area covered, which would probably was 2G. (and it seems that they also used more recent modems in later models)
They simply, correctly, decide that having the widest area possible covered now is better than to have to maybe shutdown some services at a not yet known future time.
I don't know what you mean.