The String class is kind of like training wheels on a bicycle. Babies need them in order to learn how to ride (or code), but as soon as you want to do anything remotely useful you have to take them off and throw them away.
So many of the "Why don't they fix this bug?" complaints could easily be rewritten as:
"Wah! I want to be able to do BMX tricks but I'm scared to let go of my training wheels."