[wmkn]

What? I would argue that unordered_map is nearly always a reasonable choice when in need of an unordered associative container. There is nothing particular wrong with it.

Not sure what your rationale is for saying it’s only useful for extremely niche use cases. I would be curious to know why you think so.

[MauranKilom]

It has the right asymptotic guarantees for a hash map, but beyond that it doesn't have much going for it. The degree to which it emphasizes pointer/iterator stability and arbitrary load factors is not a good tradeoff in almost any practical case (unless you do not care about performance).

See https://www.youtube.com/watch?v=M2fKMP47slQ for a more comprehensive discussion, or the sibling threads here.