Not sure either what you mean Steffi, sorry. We do start new threads after 30 pages+ as a reader friendly move, rather than a forum/server issue. This way the thread does not get too long and overwhelming especially if you are looking for something in back posts. 30 is a great number IMHO based on hears of seeing it in action. The threads seemed to evolve, change, fall off the radar, peter out or need a new update and a reboot for all to follow on from or perhaps join new.
As a mod/GM I do not find it work to do this, it is part of the job description I signed up for. I like to see the boards reader friendly and tidy, so it is a pleasure lol!
HTH
A x