"I would not be targeting my project toward a dead platform unless you already have a large installed userbase"
There is a large installed userbase of Photoshop 7.0 and earlier.
Not everyone can afford, or should bother, to keep up with the pointless churn of:
1. processor architecture
2. new releases of Adobe products with features most people don't need and whose only justification is to titillate gullible upgraders
...and where professional workflows exist, it is not even necessarily prudent to take the latest shiniest thing from the shelf: A lesson I have just learned with Leopard.
Thanks, Apple, for another lesson in trickle-down billionaire cynicism. If I wanted that, I thought I knew where to look (Microsoft).
On the other hand, for the other 99.9%, Leopard rocks. 🙂