When I was a bit younger (in my twenties and early thirties) I loved speed and I couldn't believe that I could be happy in a car with less then 300HP. I took motorway junctions sideways and needed new tires every 10.000 km.
In my commute (150 km) I averaged around 160kph.
With so much traffic these days even when I want to, I can't speed that much (within the Randstad, where I drive mostly it's almost all 100 km/h and lots of trucks).
Then I got maybe a bit wiser. Instead of constant hunting down the next car to overtake I just go with the flow. My last car was a Renault Twingo with 50 something HP, a whole bit different then the C320CDI-AMG and 911's I drove before, and loving it! Driving suddenly is super relaxed. Instead I ride a motorbike, big old BMW touring bike and normally I'm within the speed limits, with a good focus on the perfect corner, again, searching for that perfect flow.
I think in the past I've been lucky not to come into terrible trouble with a big accident, fines or even loosing my license; I've done enough to deserve all of those.
The point hidden in there, is I think, that traffic evolved quite rapidly. There are just so many movements on so little tarmac.
On motorways, It's more about congestion then safety I think (motorways are pretty safe) but within the city, all the other safety measures are pretty decent I think. It's just so effing busy!