VBulletin 4.x - 5... Time to anty up again?

[morrow]

How long with vBulletin 4.x be supported. I think the latest version is 4.2? That's what I'm using anyway. So my understanding with the whole 4.x upgrade being so expensive was that it would be good for years to come. All updates until the next full version (5.x) would be included free of charge. My concern is that we're only on version 4.2 and now we're being asked to dish out more cash for v5 before versions 4.3,4.4,4.5,4.6,4.7, etc..

So tell me... Will newer version of vBulletin 4 be released or will they be a thing of the past?

In the past we had incremental updates at a moderate cost. For example.. From version 2 - 3. Then came 4 and it wasn't a small price to pay, instead it was something around $250.00.

I haven't read anything about phasing out version 4.x but I just have to ask... Will it be phased anytime soon or will you still be providing releases 4.3, 4.4, 4.9, etc...