As a newbie here,  I often find myself going through the Audio Review threads that have been inactive for a month or more.  Often, I find music there that I want to comment on.  To this point, I have resisted this temptation because I am uncertain about what other posters and moderators think when an inactive post re-surfaces at the top of the list. 

Is reviving an old thread taboo or not?  Thanks!

taboo is a cool word.
reviving threads..............
I'd say that's fine with us. We love to revive threads, especially when no one is making any new interesting ones.