[yegle]

I would say most people who are writing C++ professionally should known what folly (and abseil from Google) is.

[downut]

Missing the most important part: avoid them (including boost), when you have a choice.

Professionals often don't have that choice. Cue many thousands of comments on HN why working in c++ sucks.

[aantix]

What should be used for a solid trie tree implementation?

Looking to implement a memory efficient search engine.

[exdsq]

Not being sarcastic here - can you roll your own?

[ravenstine]

Um... what? Why should I have any knowledge of some kitchen sink library at Facebook just because I write C++ elsewhere? (hypothetically speaking)