Hey I just had the same experience, except that my HB setup was ready on saturday for me to try it out. It had been six or seven years I didn't use a hard setup and the first run was a little hectic, but it came back like riding a bike. I did two runs at the end of the day on my freeride board with softies, so here are my fresh impressions:
- soft setup:
Pros: the touch and feel on the snow remain incredible, just as the lightness under your feet, you can ride and carve with any angle
Cons: you can't hold an edge with the same strength as you would do with a hb setup, so your carving would be limited to easy terrain and moderate speed. You can't go for EC carving with a soft setup. The flex of the board (mine is a nitro pantera 163=on the stiff side) doesn't allow very aggressive, laid down turns, but more important, the soft boots won't help you at all to lift up your body after such a turn. Riding at high angles won't help also, on the contrary.
- hard setup: you loose in lightness and versatility, but you have an incomparable strength under you feet. It's more about surfing with your body and the board coming as one. True for carving, but also to ride steep slopes with bumps. No problem to jump directly in your carving turn with a hb setup.
So, in short, softies can carve good, if you have good conditions and at medium to fairly high speed. If you are more attracted by the feel on the snow and all-mountain use, then softies win. Especially if you have no gear or can't afford a big quiver. For a quiver of one, a good all-mountain/freeride board will do it. But carving on HB is really exhilarating, with more feeling of strength and speed.
All this of course is my humble opinion to an ongoing question. Note that one of my best snowboard rides on anything else than pow are with a F2 eliminator and clicker setup. Too bad this line of research was not continued...