I just did some research and the vBulletin 3.8.0 the forum is currently running on was released in 2009 and moved to "end of life" support sometime in late 2016.
The upgrade to vBulletin 6 is $179 USD and yearly hosting packages range from $180-360 per year. I wouldn't imagine we are cruising through too much bandwidth as a community, I would just prefer a slightly newer and reliable interface for us to interact.
Normally forums pay for these services through "contributors" who pay a yearly fee to the board (Club Cobra) for some special privileges as well helping pay the bills if you will.
I for one would happily begin contributing if we could upgrade while still migrating all of the valuable information in prior threads. So while the upgrade is surely possible, the Admin would need to address the integrity of the database to ensure any faults are corrected.
Relevant Links Below:
https://www.vbulletin.com/en/purchases
https://www.vbulletin.com/en/vbulletin-cloud