Is this why AirPower never came out?

Officially, AirPower was seen for the first and last time in September 2017. A “sneak peak” at the end of an event that had already debuted the iPhone 8 and iPhone X, AirPower missed its 2018 release window and wasn’t even mentioned at the launch of the iPhone Xs before being declared officially dead in March 2019. 

“After much effort, we’ve concluded AirPower will not achieve our high standards and we have cancelled the project,” Apple said at the time.

Rumors persisted that it was both prohibitively expensive to manufacture and prone to overheating. And now a teardown of a supposed prototype AirPower charging pad makes that explanation seem very plausible indeed.
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https://www.tomsguide.com/news/airpower-teardown-shows-the-apple-wireless-charger-that-never-was