That's just because it's what you are used to. Now that I have a handle on working with the render settings, and lights, I MUCH prefer P6 over anything else. I don't think I've even fired up P5 in 2 months now. I always use 1 ao light to fill in the shadows, and two spotlights with shadows off, and that give me pretty good variety and lighting, without huge render time hits. Area render while you are tweaking is a DREAM, and I'm testing a new material assistance program for P6 that makes adjusting lots of material settings a snap! Plus of course you have the mulitiple runtimes available, and my runtimes are perfectly organized. I'm just SO much happier with P6 then P5 and I liked P5, and had few issues with it.

Way too many people take way too many things way too seriously.