Mamufacturers have been minimising wieght for years,
Like hell they have!
Cars have been getting heavier and heavier since the 70s as people think they want more and more electrical gubbins, passive safety and other such extras bolted to them.
I assume you think power steering, big fat tyres, aircon, ABS, and umpteen electric motors weigh nothing?
No I don’t and I didn’t say cars had gotten lighter either.
They have been minimising weight whist adding all the emmissions, safety frippery and gizmos that is required to sell a car now. If you built a car with todays manufacturing technologies to 1990’s safety,emmssions, comfort and tech levels it would be a dam sight lighter than they were then.