Good topic this! Gets you thinking from a different perspective
Certainly in my youth we found that gas pipers were no good. They cracked and dropouts broke off and stuff like that as well as weighing a ton - Saw more than one mate with a lower end Raleigh calling that 15 year F&F Warranty
Also while being nice rides the earlier lugged 531 bikes had an Achilles heel, a heavy frontal would get transmitted by the cool lugs to the butted down tube and crease the damned thing
Those old school Tange GTs were literally tanks though