After 36 years, I ran away from Ford, and am now selling Freightliner parts.
In 2021, when I was last at ford, all of their filters were still made by Purolator. We hadn't seen the filters with fluted housings in years. Even the trusty old FL1A had flats around the top. I'm assuming because that's how most of the filter wrenches are shaped.
But, I've noticed the pricing of late - it IS ridiculous! I've gone to Wix for my FL1A applications, and Fleetguard for the wife's 4.6 Explorer. If you guys like Wix filters, surprisingly, Home Depot has the best prices!