[Koshkin]

Slackware’s built-in set of packages is pretty small by today’s standards, and the preferred way to install Slackware has always been to include everything that comes on the distribution media. That alone would go a long way in making sure that you will not get unresolved dependencies when you try to install a third-party package.

On the other hand, I found that, often, not having to install all the dependencies, and not having the installation of a package fail because of some missing little optional dependency, is a blessing in disguise.

A couple of things that make installing software and keeping it up to date a breeze are slackpkg (built-in) and sbopkg (third-party).