> Waiting for Cross-Platform standardized SIMD vector datatypes
We sort of have this? compiler loop vectorization is, effectively, this. Granted it's not standardized.
> nonstandard extensions ... to run computations in parallel on many cores
std::thread?
> Debugging cross-platform code using couts, cerrs and printfs
True, but i think this is not the language's fault. C/C++ debugging tools are great (the best?).
Debugging any sort of meta-programming is a mess; would definitely agree w/ that. hopefully concepts will help.
> Forced to use boost for even quite elementary operations on std::strings.
This one i agree with.