The side glass is on nearly all new cars are "Snap In" Not bolted in like the old ones we love.
With a little patience it isn't hard to unsnap the glass and remove it from the car with the door shut. Look on Youtube and there are several porch cam videos of people removing the glass and getting into the cars.
Could you post a link? couldn't find what you were referring to
I have not replaced the side glass on a new challenger but I have on multiple others models. Hence the nearly all statement because I can not say everyone is like that, but all of them I have replaced made in the last 10 years or so were snap in glass. The most common breakage point from my experience is the glass sticks in the track and causes the snap to pop loose and the glass comes loose. Usually without breaking the glass but often the regulator has to be replaced. Maybe it isn't as common as I think but is the most common repair I have had to deal with.
My apologies if I had the wrong impression of the problem.
This is one video that shows the guy remove the glass in one piece.
There are others but I can't find the one I was looking for.
https://www.youtube.com/watch?v=E69xDrxAWzQScroll to 1:14 and you see him remove the glass in one piece.
