I'm old enough to recall when boost first came out, and when it matured into a very nice library. What's happened in the last 15 years that boost is no longer something I would want to reach for?
Qt is... fine... as long as you're willing to commit and use only Qt instead of the standard library. It's from before the STL came out, so the two don't mesh together really at all.
In my experience I've had no issues. Occasionally have to use things like toStdString() but otherwise I use a mix of std and qt, and haven't had any problems.
That's basically what I mean. You have to call conversion functions when your interface doesn't match, and your ability to use static polymorphism goes down. If the places where the two interact are few it works fine, but otherwise it's a headache.
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.
