Comment by oezi
I think the one key downside for std::function+lambda which resonated with me was bad ergonomics during debugging.
My unanswered question on this from 8 years ago:
https://stackoverflow.com/questions/41385439/named-c-lambdas...
If there was a way to name lambdas for debug purposes then all other downsides would be irrelevant (for most usual use cases of using callbacks).
> If there was a way to name lambdas for debug purposes then all other downsides would be irrelevant (for most usual use cases of using callbacks).
Instead of fully avoiding lambdas, you can use inheritance to give them a name: https://godbolt.org/z/YTMo6ed8T
Sadly that'll only work for captureless lambdas, however.