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BMW Is Giving Up on Heated Seat Subscriptions Because People Hated Them
(www.thedrive.com)
This is a most excellent place for technology news and articles.
The "ongoing cost" is manufacturing diversity. It costs more money to put heated seats in one car and not in another than it does to put them in all of them and allow the people who want them to simply pay to activate them.
That being said, it is a fixed cost, and should be a one-time purchase. Or at least offered as an option. At least Tesla does this correcrly.