I did some testing and also posted this in the bigger thread on firmware:
Got 2 PS4 slim CUH-2215Bs from Walmart - Both Firmware 7.02
Got 1 PS4 slim CUH-2215B from Best Buy - Firmware 7.50
Got a PS4 Pro From Target - CUH-7215B - Firmware 7.02
All stores around are OOS on all consoles near me. So these consoles haven't been sitting, they are straight off the boat/airplane.
Seems Sony allowed the release in conjunction with it to pretty much not matter. I'm unsure whether it will be worth it to keep the 7.02 models. I'm guessing the 7.02 models are basically fizzing out and soon all there will be is >=7.50
I'm unsure if it's worth it to keep the 7.02 models. Seems like it could be a big gamble if no one ever makes the webkit for it.