When we answer customer service questions for forum support about whatever, people always email us, always. Some people are like "help I can't remember my password" or "my login isn't working" or all kinds of other questions. They can't remember their user name, etc. The moderators and I need a way to quickly look up their account and figure out what's what. Always email. Almost every single time I go to the backend with a user issue, I look them up by their email. 99% of the time. Without being able to do that, now I have to go the full admin backend. I don't want to have to give my moderators backend access. I want them to be able to solve all of the user-related issues from the front-end. It's very important for us. We running a 1M post forum that I'm converting from vB. The traffic is currently almost non-existent. When I make the big change, I'll be gradually emailing tens of thousands of members over time to let them know. "Hey, new site, go check it out." The instant we start doing that, we'll be increasing in spades the number of 'emails' from members who need support.
We really need that ability to look them up by email.