As a maintainer and volunteer on some open source projects, the reason for CADT is that popular projects receive significantly more bug reports than could ever be handled by their volunteers. We're just volunteers and you can't just throw more developers at the problem. In the end, you get what you pay for. Nothing.
If the bug is still valid, then don't close it. It's not a competition for time to fix! If you don't know if the bug is fixed, don't close it. Certainly don't ask the reporter to log it again!
> significantly more bug reports than could ever be handled by their volunteers
Maybe I misunderstood this. So are you saying that the same volunteers can handle a total rewrite of the module maintaining its specified (hopefully) behavior, while remaining incapable of fixing its bugs?
