Most cars will get to 60 mph quickly enough and that being pretty much the speed limit level of most A-roads across Europe, being able to get there twice as fast is rather academic. Most cars grip well now too so they can carry enough speed through corners not to become a hindrance. Sure you can overtake one or two extra vehicles but at the end of the day you get to your destination in front of one or two other vehicles. Big deal.
Sure, sometimes one could fairly safely go a fair bit faster but we are not allowed to so HiraethHuw's comment is sadly true more often than not. Pointlessly blasting past other traffic just to be a few cars up the road when there is no significant benefit makes one look stupid for taking the risk, so one could just easy back and not become part of that embarrassing crowd.
I really hope no one out there ever bought a fast(er) car to get to their destinations faster?
Sometimes my destination is the very same space I left outside my house when I set off!!
For me, pootling along sensibly in traffic is part of driving normally. Maintaining a gap far in big enough to act as a 'damper' when the all stop / drag strip launch brigade are up ahead trying to create traffic shockwaves is far more fun than 'blasting past other traffic'.
For me, the fun part is when the road eventually clears / opens up and the chap in the big V8 GT who's been trying to push me up the road for the past 15 minutes realises that the little blue Fiat isn't the pushover he was expecting