What is this an us vs them? Really? Are you kidding?
We are talking about ADVENTURES. I would love a PDF that is availaboe for 4E encounters. I don't even care if they started with their first AP and then go from there.
If I am going to buy something to use in my game, I am going to buy something with the least amount of work I need to do. There is already enough work to get it in my game already.
This is also not a thread of cheerleading, it is if I where CEO. That is what I would do. Pathfinder, Adventure Paths for that, and conversions to other systems.