E. G. For storage and performs reasons. 5 bytes vs 9 bytes. Multiplying by amount of users and various indexes - can produce very noticeably difference. More records per page.

Brighton had a very good bus system. At least 10 years ago it covered all my needs. Plus bicycle lanes and trains to get to the nearest towns and I had 0 need or wish for a car.

I moved to US and miss those times

Not sure where you are in the US, but that is definitely not my experience. Cars usually stop the moment I stop on the side of the road. At least In California