By older, I'm talking fellas still gigging in their 60s and 70s, 3-4 nights a week. I know a few. But in terms of all the benefits...you named 'em all. I just listed the first that came to mind, as well as one of the more noticeable features of an Ampeg.Older guys?
47" flat screen tv's that weigh 20 pounds and are high def.
Cell phones that weigh ounces and last 12 hours on a charge. Some for days on a charge.
Cars that get 50 mpg.
Laptops that weigh 3 pounds with the computing power of a mainframe 30 years ago.
The Boeing Dreamliner 777 that uses half the fuel of its predecessors and gets better gas milage, and better designed as well as safer.
I appreciate your thought but technical advances benefit everyone. One day a kid will look at a huge amp and think, "I wouldn't drag that boat anchor around." Sounds blasphemous, I know, but the future is about smaller, more advanced, lighter, more powerful. Already we're seeing the swing in bass amps. Look through the classifieds and see how many large amps and cabs are for sale.
Your "boat anchor" comment made me chuckle, because weight has been something I've taken into consideration since I started playing with cabs and heads. I was always jealous of guitar players and their teeny amps...