What a biased set of tests. I upgraded directly from 10.4 to 10.6 and haven’t had any problems at all.
What’s more the upgrade only cost me $29. A comparable upgrade from XP or Vista to Windows 7 would be $219 !!
It’s nice not having viruses any more. I haven’t had a single computer virus since I switched to Mac.
I've not had a virus in 16 years with Microsoft operating systems.