This topic has come up with every platform I’ve been involved with over the last 30+ years. There will be the nay sayers for this reason or that. I will tell you that the vast experience of myself and many other MUCH more prestigious engine builders has been that we’ve never seen a failure or issue in the proper use of anti seize on spark plugs. However we have seen instances where the monkey on the end of the wrench removing them wished they or someone else WOULD have used it.
As a side note, if you are using coppers or other option or reason that finds you swapping plugs frequently, it probably won’t be an issue either way. As apposed to sitting in there for 50-100k like many do today. For that reason my own personal vehicles (daily drivers) get their plugs pulled/inspected/anti-seized very early on as I’ll probably not be swapping those out often. I don’t sleep well at night, but it’s nothing to do with worrying about a plug seizing in anything I own or work on.
