Mainly the sheer annoyance of increasing delays and gridlock. Which of course correlated with my ageing, as it's increased over the years. The journey to work being an increasingly unpredictable journey, timewise. The fun of the increasingly rare empty road remained, as did like of motorbikes, or the fun of a track day. We use the car less and less, despite the intentional political neglect of public transport.

We did a fair few trips with the kids by train. I don't believe they ever got a car journey to school wherever we lived - they walked. Luckily the street they grew up until around 12, was traffic calmed with no through traffic, so they got to play out plenty, kick a ball around the road etc. Other places made that far more difficult. Playing out today on the street _I_ grew up and played on at similar age would be suicide.