Tubaman, I hear what you say. This isn’t a home network, but a (very) small business one, for my wife’s business. Dealing with various classes of guests has become a pain and having to change passwords using PSK is a real nuisance. So your argument, while quite valid, can also be turned on its head. That doesn’t make much sense now I read it back.
As you say, it’s partially about administrative effort.
The thing is, I already have two RADIUS servers anyway, they came for free in my ZyXEL WAPs. It’s the boot time issue that has prevented me from using them, that and another centralised point of failure, although as I said, I do have two of them. If you have two for reliability, how on earth do you keep them in sync ? Or is there a built-in syncing feature in the server protocol? Ashamed to say, I haven’t done any reading up yet. Things-to-do-list.