Cases where it makes more sense to use concrete types rather than generics, even if you can be generic: https://matklad.github.io/2020/08/15/concrete-abstraction.html
matklad.github.ioCode Smell: Concrete Abstraction<p>This is a hand-wavy philosophical article about programming, without quantifiable justification, but with some actionable advice and a case study.</p>
@wilfredh Great piece of advice. I oftenbsee people who write code more generic than it should be.