Actual Evidence! (Of ToV not being rotated) on at least one server:
https://web.archive.org/web/20010405.../lanyscalendar
This is server forum calendar from Lanys, circa 2001. This is where raids could be planned and reserved, and it was respected and enforced by the server.
If you look carefully, you'll notice there isn't a single post-Kunark mob on the list. Trakanon is the highest level mob considered reservable, and even then that was controversial. There was an infamous "Trakanon is FFA" thread that had bloody flame war raging on the forum for months.