Yes, I would be happy to see the Triumphs out of Beasts. Seem to clutter up the index and I am never interested in reading any of those threads. With their own separate forum could be ignored completely.
OTOH, surely the main reason for splitting a forum would be that there is too much activity, so that threads disappear too fast off the front page. Had not noticed that recently about Beasts.
The plus side of having lots of bikes represented under the one forum head is that when browsing you get attracted to this or that thread title and so learn a lot about bikes that you might not previously have thought about.
I got quite excited about the Tiger 955i after reading a thread about how good and cheap they were. Would never have gone looking for that on a dedicated Triumph board.