I can not offer you advise on your opinions about vbulletin and there products. I know lots of vb
customers did not want to try vb4. My experience with it though has been alot more positive than the vb3 code branch which had far more severe bugs. Alot of vb4 bugs where style issues because of the new templating.
vb4 is far from dead though. They are not going to stop development at 4.21 that is a fact look at there site. 4.2 was just released in the spring and there have been two security releases since there. vb3 however is dead and has been for years which is why no new development was ever done between our product and that code branch. The functionality you want between our gallery and vbulletin has been there for years now just in the vb4 branch of code which is there active code branch.
We can not do all the new integration stuff with a product line that has been dead for 3 years. Once we get access to vb5 when a beta comes out we will obviously make sure vb5 has all the great integration features vb4 enjoys.