Manufacturers make changes but usually for specific reasons. Those reasons may be because a change could save them money or a change had to be made because of reported problems with the previous coaches. It may also be because the parts supplier has gone out of business, or they have changed their product.
For a buyer, a change may not always be a good thing, especially if the change deletes/replaces something you thought was important. Maybe the manufacturer decided to shift from a one piece fiberglass roof to a rubber roof, to save THEM a few bucks. That is a change that may not affect the operation of the coach right then but may be one of those things that cause problems years down the road.
Before you buy any new coach, make sure that it matches the advertised coach that you think that you are buying. Most manufacturers literature has a disclaimer that mentions that changes may be made during production so you want to make sure that you get what is important to you.
