Personally I find no issue with using C style strings. I am a NEWBIE to C and C++ and although the Strings are handy (lazy?) when it comes to C or C++, learning how to deal with array's or C style strings is much more important than saving a line of typing to waste 1.5K of program memory. The function to deal with that bad old issue... could well be a macro saved in what I call a "Snippet Library" (I use a sketch and add code as I find it and prove it). Keeping it in a sketch works for me as a macro/code library.
I am NOT defending the POOR choice made by the Arduino development team, not by any means but with 2K of sram in an Uno you encourage people with less programming experience than you to make uninformed decisions that waste more time than simply learning how to deal with simple arrays and the rather simple Arduino Crutch that makes sprintf work...
Time spent by the person writing the sketch to as well as the people involved in debugging it. wasted.
Bob