I've owned many Weber grills over the years. I use it at least five times a week. I've noticed the changes over time. In the end the grill is great.  But as time takes it's toll I can think of two things that were not appreciated.  One, the grill itself, the cooking surface above the fire, along with the coal grill at the bottom have gotten thinner over time. And the three side tabs that hold the coal support have become shorter.  Neither is a show stopper but noticeable. Again,  all-in-all a great product.