updates and discounts
I also have purchased previous versions, and while it would be awesome to get a free update to the new product, really? It doesn't work that way with any other software company ... I don't know how much you paid for your CS4, but mine sure wasn't free!
Since the new WA products have come out, I have received a steady stream of discounted offers to upgrade to the newer versions. Some I have purchased, some I have not. But all-in-all I have always been very pleased with my entire WA experience. (ha ha maybe this suck up entry will get me a free version upgrade LOL!!!!)