Howard, like you, I *do* rely on image backups of my system hard drive. In
fact, I've been doing it on a daily or biweekly basis.
But there are times when it is MUCH more convenient to do the System Restore
(or ERUNT) routines. You just have to have some idea of when it's prudent
to do so:
For example, just before installing a small program, or making some changes
to my configuration, which I may want to test out, I will make a new restore
point, and if it doesn't work out as I like, simply restore the restore
point (or more often, just restore the ERUNT backup, which is even simpler
and quicker).
If, OTOH, I'm installing a large program, I will just before installing it
create an image backup of my system drive, and only then install the new
program, and see how it works out. If I don't like it, I restore the
image.
An example for this would be for something like installing MS Office, or
even MS Word, for that matter. A System Restore point wouldn't
(typically) be good enough, in such a case (IMO).