Geez, are you going to argue with people who claim the original Mustang/Corvette is the best Mustang/Corvette ever made and don't qualify their statement? Lots of anal posters on here.
Cars are different. Not a good comparison. Yes, I'm anal, but that's just part of who I am.
Is Mac OS 9.6 still the best Mac OS ever made? No. In all ways, it was inferior to OS 10. THe only thing going for the original iPhone is possibly durability. The iPhone 4 is better in almost every other measurable and comparable category.