[EasyMark]

How about the subset of simple classes, RAII, basic containers(vector, map, duque), single inheritance, overloads for type safety/less casting, stronger casting features, references. Things that c programmers can pick up quickly and use in both c-style and c++ style? That’s what we do and it works out well our embedded. There are a host of embedded STL libraries to let you do hard limits and checks on containers to prevent “hidden” dynamic memory allocation and the like. Of course you’ll have to depend more on the quality of your compiler’s reputation for the processor, c++ is much much more complicated compiler than c and more apt to have bugs. But we’ve yet to encounter anything that forced us to say “f this generated incorrect assembly because of a compiler bug”