I've used v.2.1, 6, 7, and 8. going from 2.1 to 6 was a lot like getting out of a go cart and into a 'vette. Sure, there's a few extra things to look at and learn to use, but it the end it'll all pay off in a faster, more comfortable system.
If autodesk ever makes a "classic" version of the software, i hope they include an improved-interface option for those of us who ran out of queludes as well. 😉
For power, i can understand liking the older software. Heck, i think win3.x is a beautiful thing for power management and ease of use. I also think that with over 2 1/2 gigs of processor, and over a gig or RAM, i don't need win3.x any more than i need sketch 2.1. They were both great in their day, but the bar's been raised.