Not just older phones
The BBC WML site was also very good for the "cheap and cheerful" low graphics content, especially useful if roaming abroad or you just wanted the information quickly without fuss.
Don't get me wrong, mobile web is a fantastic thing and times do move on - but the BBC's wasn't the only decent WML site that remained damn useful. There are times when "big and fancy" is a good thing, there are times that "cheap and cheerful" - or at least the choice - is also a good thing.
I'm only glad several other equally useful "WAP" sites remain functional, useful, alive and kicking. Ok you don't get the full and fancy functionality of the "mobile web", but just like some older phone models - you get "the basics", delivered quickly and without fuss.
If the development costs have already been spent, well... mine's the one with the "luddite" cap in the corner who believes in change for the sake of improvement but not for the sake of it.