It is important to keep in mind that when silicone was introduced it was the greatest thing since sliced bread.
As Elmer Kieth said..Hell-I was there.:B
I would guess most of the people trashing silicone have never used it.Silicone works and others works also,some supposedly better but I won't comment on the supposedly better because I have not used them.
Most all of my travel is off pavement on wash boardy roads and I have yet to have a window leak in any RV I have owned...Roof yes/window no.
I guess that sliced bread is still pretty good.If it ain't broke don't fix it!