Although I do not feel as strongly about the matter as I do believe Steam to be very good, I have simply fallen in love with GOG's policies of having no DRM, no regional pricing, and other such goodies. I am presumably not as old as you, but I can very much grasp the issue you speak of, and have strenuously supported and continue to support the notion that GOG should make its way to Linux as well. I even submitted a self written article on the matter to Slashdot regarding GOG and Linux (there is more to write than you may think due to there being plenty of sources) and despite receiving an email telling me that the piece has been "favorably rated by Slashdot editors and readers," the folks apparently get too much sent in and therefore could not publish it, which I find unfortunate, especially since the Linux section is only updated with one or two articles per day as is. Whatever the case, if you love Linux, GOG, and dislike DRM, regional pricing, and other such restrictions, vote here:
http://www.gog.com/en/wishlist/site/add_linux_versions_of_games