I use boost and Qt but completely disagree. Every new version of boost brings extremely useful libraries that will never be in std: boost.pfr was a complete game changer, boost.mp11 ended the metaprogramming framework wars, there's also the recently added support for MQTT, SQL, etc. Boost.Beast is now the standard http and websocket client/server in c++. Boost.json has a simple API and is much more performant than nlohmann. Etc etc.