Various options cost money. Lower production runs for each type, stocking of different options and raw materials, for suppliers, manufacturer, and retailer alike. Could they offer what you describe, sure, but then they would all cost more. Would it increase sale, not sure, probably, but by an insignificant amount. If they thought it was cost effective, would make money, and was a direction the wanted to go in, they would have done it already. Additionally, you’re not likely to hear about any plans in here. Blink discuss nothing of their future plans, and have stated on more than one occasion, in this forum, that they are blocked from doing so by Amazon.
As for PIR detection through glass, a quick Google will show you that it is unreliable at best, or even a search of just this forum will demonstrate the same. Some glass works better than others. Infra red is blocked reasonably well by most windows, especially modern double or triple glazed solutions, designed to preserve heat in your building. Apparently plate glass is better, especially some older types, so maybe that explains the success with your car. Additionally, you will have the benefit of proximity. If people are trying the door, you’re hard pressed to have the camera and sensor more than 4 feet away from them. Expect it to pick them up reliably, from 20 feet away, as they approach, like it normally would, with sensitivity on default, and I think that unlikely. You probably got them as they jiggled the handle.
Would be nice to see a video, of exactly where you can get a trigger from in a car. At least you can turn the sensitivity right up, because there’s nothing going to move in the car for a false trigger. I imagine it would be tough to get reliable WiFi too. I suppose you would have to have the car parked right next to the building, and pretty much on top of the router and sync module. Not something many could easily achieve, myself included, unless I completely rejigged my system. If I had the need though, I suppose I could come up with something, so good to know you have had success.