I'm afraid that people will have to get used to the 20 mph limit or they may find themselves banned from driving if they accumulate too many points.
One stretch of road I will be glad to see the 20 mph limit is Llandudno Promenade. It's a nightmare driving along it especially in the Summer months when people suddenly open their car doors or walk into the road without looking.
I remember years ago, I was driving along the Promenade when a young woman with a group of friends just ran across the road and I had to do an emergency stop to avoid hitting her, thank goodness I wasn't going fast and the conditions were dry or otherwise there could have been a tragic accident
I got out of the car and gave her a piece of my mind but her friends said that it's ok nothing happened, but it could have been so different