As a full-time C++ developer, my only gripe with features like these is that they require nontrivial compiler optimizations in order to produce the equivalent "

As a full-time C++ developer, my only gripe with features like these is that they require nontrivial compiler optimizations in order to produce the equivalent "old-style" high-performance code. That leads to two issues for me: 1. Longer compilation times 2. Your program may be too slow in debug mode for you to meaningfully debug it We're kind of at a crossing point where I would love it if I could have a compiler that "de-sugars" these expressions into optimized C code, i.e. removes the lambdas, adds local variables, etc. and then compiles with no or minimal optimizations for debug mode. I really love gcc's -Og mode, which should do something very close to that, but I still have to read the assembly code to get a full picture of what's happening. I feel like we could do a little bit better. Edit: And if you're wondering why I care that much about performance, it's because there is really no reason to use C++ today other than to write high-performance software. There are other languages that can get bare-metal performance and I don't want to insult anyone using Fortran, Ada, etc. plus I'm keeping a close eye on Rust, but the combined tooling that exists for C++ still makes it a better, more productive alternative as far as I can judge. The other reason to use C++ would be to interface with a C++ system, in which case it might be easier to just write everything in C++ and skip the translation layer pain, but you might not care that much about performance in that case.