Advanced support is rarely used. Maybe a couple times a month out of all the support that is done will an advanced support issue come up. Advanced support is normally only needed when I have to actually work on a problem at the server level.
I'm trying to think of an example when I've used one with threads but they are very rare. Old classic installs would use them for time to time when the file corruption couldn't be fixed with the normal control panel means. I'll guess I can put it this way, since 7.0 has come out, I work on a handful of tickets every day and I think I've had one user need advanced support. And that was because he requested that I do some custom work to duplicate his old board
