I couldn't agree more. As I use a home tower, I keep all data on a separate devices, each backed up twice, one which is external. With the system partition limited in size, I frequently use Reflect to mirror the system partition when I am about to make any type of change to it.
The days of spending weeks re-installing the OS and all App's are gone. 10 minutes to 'dump' the mirror back to the drive and it kicks up again as nothing ever went wrong.
So, these days, I care less what I rip out of the system. System restore is something that no longer exists in my OS.
...Ray