On the other hand - if they ditch support for 3.x in favour of 4.x (which should work), what are you going to lose? If you don't touch it, this old version can't run any worse than a bright shiny new product.
I'm a member of another forum that's using 6-or-so year-old software. There's nothing (well, not enough) compelling in newer software that makes them want to upgrade, even though it'd be free. However, every few months, they get hit with new spambots or some other problem that knocks the forum offline.
Hey, Windows 98 works just fine on my little Toshiba Libretto that I've repurposed as -- solely -- a network jack tester. I wouldn't trust it online, though.
So, as long as there are security updates to the 3.x platform, I can't see a compelling reason to update. Additionally, using the other forum I mentioned as an example, I've not seen a problem with newer SQL or PHP versions (read: server stuff) that required you to update forum software that was already ON the server.
In the past, we had a version of vBulletin that required a yearly fee to work. With that, I could easily see vBulletin saying, "You WILL be upgrading or we're turning your forum off." We now have a different license and we own the vBulletin software, so that's no longer an issue.
I do think vBulletin 4.x has some worthy features, but I don't think they make up for all the problems 4.x has.
On a completely random note, but I'm responding to a couple earlier posts, Windows 7 SP1 came out last month and, contrary to normal thinking, it did not have any new features.
Internet Explorer 9 came out last month, as did updates for Firefox, Chrome and Safari. I do not have IE 9 installed on my "main" computers yet. That means if you have a problem with this forum when running IE 9, I might need a bit more time to research the problem because I'll have to get it installed, first!
You can look in some of the above threads regarding the pain encountered with vBulletin 4. Since my last post, there have been dozens of updates to vBulletin 4, while we've had two or three for vBulletin 3.
I haven't seen too many administrative pop-ups recently for vBulletin 4 -- I get them when I access the Admin page to approve new users 'n' stuff. Today, I found out why: vBulletin 5 is in beta-test stage. You can see a demo of it on the official vBulletin website.
There's a good reason for me to mention this: the version of vBulletin we use, 3.8, has been end-of-life'd.
This means that [3.8] will not have further bug-fix release or new functionality added and may not have any future security patches. We will evaluate security issues if they are received.
I've been repaired. I feel a lot better than I did after a hernia operation I had appx. 20 years ago. I do have pain meds, but I only needed them last night (so far) and I feel more sore than in pain. I did sleep for 11 hours last night, too. Dr. said I could return to work 3-4 days after the operation, but I've taken the whole week off -- I've gotta use the vacation time, anyway. Follow up appointment on Friday.