Wouldn't it be nice if they did give one more shot to at least fix the obvious niggly minor bugs in the existing software such as importing images, without the big overhead of a complete re-write  on a modern futureproof development framework.  I have got Bryce 7 to work on Mac Mavericks, using VM Ware Fusion and emulated Snow Leopard Server, so there is a viable work around.  What I really like about Bryce is the user interface and the render engine, particularly water and reflections. And the older code runs very fast now on the latest processors, my render times are what I could only dream of back in 2005...