This 100%. There's a big difference between looking for maintainable and extendable code and the "right" solution. To me, that almost no one passes is a red flag - if you are screening resumes right and framing the question right, the pass rate should be at least 25% IMO.
Extensibility/maintainability also exist on a spectrum - a less than ideal answer can still be pretty close.
Extensibility/maintainability also exist on a spectrum - a less than ideal answer can still be pretty close.