It felt like there was a span of years when the older pc games were not playable on the current pc operating systems of the time. But then the internet took off, fans got pc savy, gog.com showed up, etc., ...and now most (all?) games can be run on the current operating systems. And I think fans and gog.com will keep this game playable for the long haul.
I only completed the BG Saga once, but damn if I don't think about this game all the time. I got several game plans laid out for more completions of the Saga. I really believe that I'll be playing this off and on for the rest of my life.
Personally I don't have any need for Beamdog's Enhanced Editions, but I am glad that they have inadvertently shined the spotlight on my favorite games of all time.
Cheers!