Totally justifiable IMO. In my day-to-day life its much more important that my shit works when I need it to than that I get whatever potentially something-breaking latest hotfix patch for everything on my system. Put simply: My OS, and the packages I use, work. If I don’t update, I’m sure it will also keep working. When I have time for an update to break something, or want to pull in some new feature or patch, I’ll run an update.