I noticed, on my old 2001 Golf, the torsion bar was very thick and the springs were also thick. When I got my new Golf, it has IRS but noticed the springs were much thinner and smaller gapped. Since TDI models have torsion bars, I looked at one and noticed it too, was much thinner in girth than my old one. It makes sense though, my 2001 Golf weighed roughly 3,100lbs. My new one with navigation, heated leather seats, sunroof, etc. weighs just over 3,000lbs. I’m not against this movement unless it means that our cars are going to fall apart more quickly and be less reliable. However, I don’t think thats the case since I read a few studies that showed that new cars are much more reliable than cars 10, 20, or 30 years ago.