I thought about this some more and remembered that we do do "trending" of just about every subsystem on the spacecraft, and comms is one of them. Pretty sure there's a slide in a presentation every few months looking at how many times the radio has been turned on compared to the number of times it was designed to be turned on, but I assume the component in question is just the relay that switches it on. We have similar plots for everything that can be turned on and off. I think the point of these presentations is just to think about what's likely to die first and to make it obvious if we suddenly change how often we use things.