Just curious what the rest of the gog's thought about having a button for grabbing a demo for the game your going to buy? I mean ya, theres TONS of places to acquire the demo but it'd be really convenient to have it right here on a page of an old game you never played and wonder what it played like without having to buy the game first.
Just a thought.

Probably not cost effective to make sure the demo runs the same as the full game. If GOG provides the demo it has to be a demo of their version... if you find it somewhere else there's not the same expectation of the stability on modern OS's.
In other words I hope they never provide demos as that time could be better spent on actual releases.

As above. But I'll also add that no end of demos have put me off games that are generally well received. The demo would have to be a good showcase for the game itself and that's not always possible without making the demo too big.

I personally think demos would be great, as even with GOG's optimisations, with all the possible configurations out there it'd be really useful to test before you buy.
But i understand that GOG'd probably spend more time making sure demos were compatible than making sure games were compatible... and releasing un-fixed demos would just put off many people.
Not much that can be done i guess...

There is a thread listing demos for most GOG games. Though, as had been said before, they ARE NOT updated to work correctly on modern systems, and as such may be totally unusable.