Hey
There are allot of old topics talking about the String library having memory leaks which will eventually crash you program.
Is this STILL true or has the Arduino Dev team since solved this?
The String library uses dynamic memory allocation to do its job (malloc and free). For a long time there was a leaking issue with free which is now resolved.
There is still a risk of fragmentation occuring when using String and given the small amount of RAM on most arduinos this leads most experienced users to advise against its use.