We all know brifters shift faster than downtube shifters, and carbon frames are generally lighter, and disc brakes stop faster, and more gears add closer spacing and 11 tooth cogs. So technology is better today than in the past.

The question of whether these differences will make your ride faster or more enjoyable is debatable.
Some people like new stuff. That's all that matters, really. Any justification they use is fine by me.