Well, a little caution is not unreasonable. Nobody is perfect after all. I usually update one of my devices on day of release, and wait a day to see how it goes (and to listen for screams from the Internet). I think 10.3.2 has been out for a month now, so we are long past a "little caution".
I think it's reasonable to ask. Although security is always a reason to update, performance varies. It can be quite frustrating getting stuck with a buggy or battery guzzling update