MAGA MAN
Let's go Brandon!
It was never all that wide that I noticed. They sell t-shirts with the signs and saying though. It's something that apparently all tourists think it is just the thing that needs to be remembered about London.
Street cars in Switzerland and Germany don't have that problem. In some of the German cities their streetcars are built so low that the platforms are not much higher than a standard curb. This allows incredibly easy access, even for wheelchairs. And most of them have GPS tracking with message boards relaying in real time when the next train is.
In contrast, London is at least 40 years behind. But it is "quaint".