It would be great if companies like Lucasarts did this for some of their classic adventure games.
You know, for many years, LucasArts DID sell their classic adventure games on CD-ROMs, and continued to sell them via their online store. For years, every single one except for Loom could be bought there. But around the year 2000, they dropped everything but the Monkey Island games, Sam & Max, Day of the Tentacle (including Maniac Mansion), Indy4, Full Throttle, and Grim Fandango. Around 2003, they dropped S&M, DoTT, and Indy4. Now their only adventure game is the atrocious (compared to the first three) Escape from Monkey Island.