Your taking a chance on relying on any 20 year old car as a daily driver. On that note though, Mine was driven very regularly intil the last couple years. I've been having issues with keeping it running reliably, plus with two kids, it just isn't as practical as my Bronco for hauling them around.
I now have it running good again, and plan on driving it a lot this summer.
The SVO all too often, has parts that you just can't go down to Autozone or the local junkyard and get... So even if it's an easy fix, you might be without a car waiting on parts.
Oh yea... Mustangs, V8 or not suck in the snow.
I wouldn't discourage using it everyday, but would have a 2nd vehicle just in case.