I fully agree with you but still, I like to be able to use this feature, it has saved me a couple of times without having to try a full restore. Granted, it is unstable, SR points are quite "volatile".
BTW, regarding Registry Backup only, I remember the day when I discovered this program, I did a backup in the morning.  At noon, for some reason, my PC crashed more or less, at least some apps froze, so I tried to close the session.  It finally closed the session, but after the reboot, all my configuration was gone.  I was pretty sure the registry had been damaged during shutdown. I then remembered the backup done in the morning, I was able to restore it effortlessly and, at reboot, everything was fine again ! Incredible.  I remember having done a small donation a few days later (using my Paypal e-mail address, not the one I am registered here).  And my PC almost never crashes.  What a coincidence !