I laughed at it at first. My friend is one of the biggest casualty brokers in New England. He also owns about a dozen great cars. He was pretty darn firm in his advice. As in, it's a Federal regulation. Followed by, "you're going to cheap out and not do it right? Seriously? Don't be a dope!"
The picture he painted was that in accident, for whatever set of circumstances, a front tire is destroyed.....pothole, hits a curb, whatever. Car is towed and inspected by the adjuster. Adjuster sees aftermarket rims. Hopefully we had the presence of mind to remove the black tape over the light! Maybe the adjuster doesn't catch the lack of sensors.......probably not. These guys aren't "rocket surgeons", but they are trying to figure our who's at fault. If they did dig into it, a lot of "bad things" could ensue. Like defrauding an insurer. Not worth the risk, or money, to me. I sold the wheels for $25 less that it had cost to ship them. Oh, well.
He's a good friend, a good guy, and he quickly convinced me. And he told me that the TPMS in his S8 sucks. Never works right!