I think TV companies don't take as many risks any more, it's a bit more prescriptive. There are more channels but there seems to be actually less main network channel comedy. You can't offend people as easily, people take things very seriously now. I think that's down to social media though because people can have little tribes of offence.
When I was about 17, I had a row with my mother and left home for six months, renting a flat and working as a waitress for a while. I learnt you could double your earnings if you gave good, cheerful service. It taught me that in any job you can improve your lot.