I have a 22" Weber Performer. It has been well-used. This machine is probably 22-23 years old. It was purchased for my parents originally, but they won't take the time to start charcoal and do the other work necessary to maintain a kettle. They have a Weber gasser that they use extensively. So my question is about my performer. Is there much of a difference in how well the newer kettles are made vs a 20+ year old kettle? Or has there been any changes in materials or material design that would make a newer kettle more efficient enough to update / upgrade to a new model? If I had the money to blow, I'd buy a 26" kettle, just to have the extra room. I have 3 kids, and 2 of the kids won't eat anything with any kind of grill marks. So half of the food I cook is cooked directly over the coals (unless it's to be cooked indirect by design) and the other half I cook indirect while also putting the food on some mats I bought on Amazon to prevent the meat from getting those beautiful looking marks. So how much better are the newer kettles vs the older ones? Would I gain anything buying a new kettle? I hate to give my Performer the boot, it's a great machine. But I am just curious if the newer machines provide anything for efficiency as far as heat and fuel go. And I've never looked...if I buy a newer 22" kettle, could I just pull my old kettle off the frame and hang a new kettle in its place?