I say always have two output devices. The cost of imaging downtime is high and, in our location, that downtime can be very long for a repair or resolution.
Build out your workflow for when you have to use it- make sure staff has some protocol for putting glass back on expo unit, aligning films, etc. and that this gear is easy to access. Ensure the printer is running, print something on it weekly, don't let prepress forget how to use it, set a curve on your film RIP and test print to roughly match your CTS dots so your repeat sim pro work isn't messed with, and so on. You may never need it but the little bit of work to keep it around will pay off that one time you might. Maybe load up that printer with epson color inks and you can run off shop signage and silly photos or something just to keep it actively in the mix.