To answer this question, I went to each forum individually in
SPACEFLIGHT SIMULATOR and
NON-SFS and did a search in each of them to roughly determine the amount of pages of messages I have in all of them, and these were the results:
SPACEFLIGHT SIMULATOR:
Discussion: Approx. 25 pages of messages
Challenge/Mission Ideas: Approx 18 pages of messages
SFS Videos: Less than 1 page of messages
SFS Art: Approx. 3 pages of messages
Help & Support: Approx. 5 pages of messages
NON-SFS:
General: Approx. 22 pages of messages
Comedy: Approx. 3 pages of messages (There's actually around 16 pages, but after page 3 or so it's mostly the old deleted La Comedie thread)
Non-SFS Art: Approx. 5 pages of messages
Non-SFS Videos: 1 page
Total pages in Spaceflight Simulator: Approx. 52
Total pages in Non-SFS: Approx. 26
And with this in mind, the loss of Non-SFS would (this is a
very rough estimate) lose me about ~650 messages, meanwhile I have ~1300 in Spaceflight Simulator.