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VW Is Putting Buttons Back in Cars Because People Complained Enough
(www.thedrive.com)
This is a most excellent place for technology news and articles.
If it's the kind of thing that it's not reasonable to expect that people will stop by the side of the road to do, it should be buttons. The rest can be touch.
So for example setting a destination on your navigation interface is fine to do via touch screen, but starting/stopping swipers or changing audio volume is not.
Very well put.