It's not just a matter of time it takes @theymos to make changes to new software.
After so many years, the current software has already undergone so many changes, that many of them certainly don't even remember where they are. So it was easier to start everything from scratch, than trying to make updates.
Now a question is spinning in my head. As he said, he id the only sysadmin and on-demand programmer. What will be happen if we unfortunately lost theymos? This may doesn't make much sense but the possibility is unlimited.
I believe he already thought about that, and there are other people who are prepared to continue to maintain the forum, in case something happens.