I do use slapt-get for most of my package installs, upgrades, and yes, system-wide upgrades. I do know the commands. However, I am very much a visual person. It's the way I learn and the way I absorb information best. I just plain find it easier to use gslapt for checking out what's available. gslapt is reliable and works well.
I agreed with Granny Geek when she called disabling the feature "nannyism at its worst". I even quoted that in my reviews. We have to trust our users to make intelligent choices. We don't disable root access, do we?
Also, whatever complaints people may have about packagers and the repository maintainers (myself included) the fact is that things have, for the most part, been handled very well. The proof of that: the fact that for nearly two years now a system-wide upgrade within a given release has worked without breakage. It's been just as safe in Vector Linux as in Fedora or Ubuntu or Mandriva or SUSE. Heck, we've actually done better than a couple of those. Of course, our repository is still smaller than the big distros but it has grown steadily larger over the past two years and , while we've had a few glitches or hiccups (mainly a missing dependency here and there because packages were moved at different times) there have been no major problems.