What happened to it?
In short, it was mothballed. The index page was growing all the time, with new additions which do see some traffic. I think the last post in the 'other marques' section when it was retired was in the region of two or three months old.
We decided to have a fresh start with 'General Automotive' which is the new location for perhaps two or three previous sections, thus giving us something getting on for a 200 pixel scroll advantage. The previous posts weren't merged into General Automotive (fresh start and all that); but they weren't deleted, so if there's something in there you need, let me know; if you're just wondering where to put a fresh topic - General Topic is your best bet (so long as it doesn't fall into a technical category better served in that area of the board).
All the best,
The truth they're trying to keep from you is that IPv6 has nothing to do with address space; we're actually running out of full stops.