So I know the long standing advice is to never change the url (structure, rewrite, etc.) on an established forum:
We are updating our established forum and taking a look at options related to vBulletin again, including using vbSEO. We've never used vbSEO, and we've never implemented any of vBulletin 4's built-in "friendly url" settings -- we are still using the standard showthread.php?t=8675309 default vB link structure as we always have.
What results (good or bad) can we expect if we change our url structure (say, to a SEO title based via vbSEO) on all those existing thread links? Is it really not worth the risk? Would like to update all those link urls to get the thread title in the url, but if it's only cosmetic with no real benefit and/or does short term or long term harm, we obviously wouldn't do it. We'd also like to work to eliminate any unnecessary pages from indexing, etc. which is why we're looking at vbSEO. What do you think?
Appreciate any help/info/suggestions.