It seems reasonable if you're thinking about the amount of material that must be sourced, transported, processed, etc. also serves as a check that the newly produced planes weren't simply 70x smaller than before.
Imagine measuring computer hardware output by weight.
The key and important factor of computer hardware has little to do with weight.
Whereas, weight is an important factor for aircrafts. A plane produced today will have similar capabilities as a plane produced 30 years ago of the same weight.
That is absolutely not the case for computer hardware.
Hell, compare the F111 vs the F22 on every available metric.
Just like flops/gram has dramatically improved over time for computers.