It's not a matter of doing it "part-time". The original example given was that if somebody said "this way is better" and they had lots of upvotes, then it would be worth looking into. Thing is, that's a rare case in a conversation. Most talks here are opinionated, and opinions don't require research. In the off-chance that there is a comment that has, say, five responses suggesting alternative methods, then that's obviously a subject that warrants research on the part of the original commenter, if he cares at all about the subject.