I know the expanded usercard is a privilege given to established users. However, it would be much more useful if you could see some basic profile information of any user without having to go to their profile page — regardless of how many posts they have. At the moment, all you can see on a usercard is the reputation, name, and badges. There are many cases in which you need some basic information about the person's professional background, nationality, etc. as well mentioned here. Just for instance, I'm an English learner on ELL and anytime I receive answers or review other posts, I have to go back and forth between the posters' profile pages and their posts to check at least two pieces of information:
- Where are they from:
- Are they native speakers?
- Do they speak American or British English, for example?
- What do they do:
- Are they English teachers?
- Are their jobs somehow related to the English language, like writers or newspaper editors?
It helps me evaluate and understand the posts better.
Having the expanded usercard is considered a privilege for some posters, but not having it is a nuisance to some readers. Simply put, it's against the site usability.