Until your client tells you that it doesn't work in Edge and you find out it's because every browser has its own styling and they are impossible to change enough to get the really long options to show up correctly.

Then you're stuck with a bugfix's allotment of time to implement an accessible, correctly themed combo box that you should have reached for in the first place, just like what you had to do last week with the native date pickers.

It’s great to see practical examples that push us to consider what the platform already offers before adding more layers of complexity.