Kind of off topic, but is there a good "catch up" guide for people who stopped paying attention after C++11? Like a quick summary of just the useful, practical things you'd actually want to use in production, rather than the parts that are only interesting to computer science academics? Most of the "what's new in C++X" guides seem to just dump everything on you at once. I feel like I should get back into C++ but I don't think I really need to care about folding expressions or std::bit_cast.