He is no longer leaning, he has already made up his mind. This is what it is all about - you try them all and then decide what works best for you. I was once solidly in the Garmin Pilot camp, I tend to like to support underdogs (GP's market share is about 6-8 times smaller then FF's) and was even resisting to give FF a try but once I did there was turning back. Like you said to each his own. My wife is now on the market to replace her car and the selection of potential cars is so vast she is totally lost, fortunately we only have a handful of EFBs to consider.
I think it was not ADSB boxes specifically, it was a general ban that applied to non-approved electronics being used in flight. The ban was lifted some time ago.
Wishful thinking, I think on the part of the case manufacturer. Note the ad is for the 2016 release of the iPad Mini 5.
We had that same ban. It was targeted at cell phone use and selfies happening during flight , but written in vague language to avoid loopholes like "you didn't say I couldn't use my tablet to take a selfie." I don't think there was any intent to prevent people from using ADS-B units, EFBs, or topo software.