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This is similar to me. As far as modern stuff, I'm willing go upto c++20, and I use smart pointers, templates, constexpr, RAII, and STL.

With templates, I use them for generics, but also judiciously to create meta-linguistic abstractions to get around certain limitations of language. For example, I built an ORM using them.

I don't use auto, or lambdas, or even foreach (I use iterators), despite oddly having much more dynamic language experience.