Ifyou want to feel you invested in quality, the Air makes you go “ah lets just add a few bucks more for the Mercedes“, so to speak, and then you go get the Pro and you don’t look back, because the Air isn’t a truly compelling buy.
Funny, because I feel the other way around - the Air is a goldilocks iPad - not too little and not too much... not too little in the way of capabilities (like the ordinary iPad) and not too much in cost for little extra capability (like the Pros).
It is in fact that best iPad for the price, IMHO. The Pro is too much for the little extra it provides and the ordinary iPad is way too little technical capabilities.
The above video speculation about the Air 4 is classic - if very, very clumsy - clickbait. Wild speculation about fabulous capabilities just around the corner - I, in turn am pretty much 100% convinced that will NOT happen. Want proof? Just look at the disgrace the updated Pros are - virtually nothing has been added... now you're telling me the Air 4 will be heads and shoulders above the Pros... when hell freezes over. Clumsy, clumsy clickbait.
Here's the reality. The Air 3 is a fantastic iPad and the best option of them all, IMHO, the Air 4 will be a small bump over the 3, just as the recent Pros were tiny, tiny bumps over the last Pros. YMMV.