Giventofly, Here's a photo of my 1982 Fuji Supreme... very similar model to your own. I've been commuting with this one for the last two years. I don't use it in winter as I can't fit studded tires, but other than that, it's a fine commuter.
I haven't tried any off-road or touring. It's not really set up well for touring, but you could get by I think.... at least for short tours. I have tried longer rides, but the road bike double chainring crank seems a bit of a showstopper in the hills.
It'd also very upgradeable. You should be able to move to a cartridge bottom bracket at some point and I have tried 700c wheels and they worked fine with the long reach brake calipers.