I've V6 running from an older (10.4 PPC) Mac to drive my Epson9600, where the B/W quality is excellent on the Matt papers I use.
For my 7880 with Pk ink I just didn't see the benefits (for my type of work) for the rather steep up/crossgrade pricing.
V8 seems to offer a lot of features I'm unlikely to want to use. Where I did want tiling, I found that
ImageNest on the Mac did all I wanted for much less, and with a more generous approach to upgrades/updates.
I'm sure there is a market for IP, it's just I no longer think I'm in it :-)