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GM Reverses All-In EV Strategy to Bring Back Plug-In Hybrids
(www.thedrive.com)
This is a most excellent place for technology news and articles.
UltiFi, the software on all GM EVs, is Android Automotive with an icon pack. All of the services are Google's (Maps, assistant, app store, etc). All GM does is change some graphics. Nothing about it is in-house.