Cyronax
Explorer
I've always sort of considered 3.0-3.5 to be essentially the same edition, repackaged, for an 8-year cycle total (5 years for 3.5 alone), but with a lot of re-use throughout internally. That repeat/reuse was frustrating then.
I don't take as much issue with cross-edition repackaging ... after all, you do want to bring core elements up to whatever the new mechanical baseline is. 4E had a lot of innovative changes, so it seems reasonable to expect to update/re-write a lot of prior mechanical material into the new mechanics. But much of the Essentials line looks like a repackaging internal to 4E. I suppose that's like a 3.5 without a 4.5 label.
Got it on all the business reasons to continue to sell products ... but where are the new innovative products? Is the answer to shop Paizo for Pathfinder?
I was being a little facetious in some of my earlier responses, but I respectfully disagree about the 3.0-3.5 transition. It felt much more drastic and annoying than the 4.0-Essentials transition. I felt that WotC forced me to buy the 3.5 books to stay current. The current model is much more seamless and has many more workarounds -- including free articles to help transition between the maths, explicit statements about their design philosophy, and their attempts to make Essentials and early 4e compatible.
But above all, yes the cycle for change has dramatically shortened.
I think one innovative step I'd like to see is WotC have a one more more products that also support miniature-less gaming.
It would be a niche product possibly, but it would be a money-maker I have no doubt. It could probably be part of 4e's version of Unearthed Arcana.