We have 198 questions tagged usability. It's currently defined as "the ease of use and learnability of a human-made object," which could apply to just about every question on UX. Is there a way to define "usability" so that it would apply to less than 10% of the questions?
If not, please join me in retagging usability questions -- removing the tag and also evaluating whether other tags on the question should be added or removed. Thanks!