I fail to see any DAZ bashing going on. If anything, people are extolling one of their figures, namely V4. I agree with Male_M3dia that vendors do this for a living and thus choose to support what will bring more revenue for them.
Since V4 is not being used as much even minimal effort is not worth it because with that same effort they will sell more for G3. That has always been and will be the norm. Remember how everyone dropped V3 like a hot potato when V4 came out?

Thanks to Male_M3dia for also pointing out the many face morphs V4 has as I believe that has been one of the main reasons she was able to "survive" for so long. The versatility of characters for V4 is truly amazing. Maybe more vendors will be inspired to make face morph packages for G3 which will surely be a lucrative product since that's an area G3 is lacking in.

As for wishing for more V4 products, I was caught up in that for a while until I realized that hanging on to something and not accepting change will only needlessly hold you back. Right before V4 came out I had just decided to buy all the AS (As Shanim, Aery Soul, whatever they were called then - Awesome Sex would have been my choice, then we'd all remember it) clothing and characters for V3 that I didn't have. A couple of weeks later V4 burst on the scene and I have hardly used any of those V3 items. I'd have liked to but the newer ones were always that much more enticing.

I think this is what's happening now something that failed to happen with G1 and G2 for some reason but it's a normal market reaction so we shouldn't begrudge vendors who are, after all, just trying to put food on the table and pay their bills.