I understand not wanting to support old platforms but still. I'm running 10.7.5 on a white iMac. That hardware won't run anything newer but I don't care, it does everything I need. Same with my Aperture 3.4. It is perfectly sufficient for lots of people, I suspect. But sooner or later, I may want to buy a camera whose RAW won't be supported by my computer hardware/software, and I find that annoying as hell, because there likely won't be any meaningful technical reason for that restriction. I, and others, might even be willing to pay to have that new RAW incorporated into my older apps, but I won't get that option.
I wasn't happy with 10.7, they removed several features that I use and like. Plus, I really don't care for my desktop looking like an iPad. My solution was to create a second partition for 10.7, where I can update to the latest version of software, but stay in 10.6 as much as I can.