I believe they hide it so that users cannot complain about the old posts. This is not a solution, but a smokescreen.
- Your place or mine? ;)7%(1)3%(1)Vote0%(0)
Most Helpful Girl
I hate it. When I go back to questions where I have been selected as MHO, I need to see how old it is. If it's older than a month, then the computer selected my answer as MHO and not the actual owner, meaning that I may not have rightfully earned the title of MHO. I like knowing whether my response was helpful or not.1
Most Helpful Guy
Yes, I hate this. I see no reason whatsoever for it to be so. In fact, they should go the other way around and show the age indefinitely. Sometimes it'd be nice to go to, say, one of those highly upvoted opinions that they show on your profile and see how old they were exactly. Now I have no idea anymore.1