Jorev: Has GoG given up on pursuing the rights to sell older games and update their coding like they used to do?
There is such a high demand for PG1.
Also Allied General, Star General, PG3, People's General;
It is not that they don't care. It is that unless it is a super popular old game a lot of time it is not worth a lot of their time to try and track down who the new owner is and fixing it so it will work on a modern machine.
For instance Tropico 5 from GOG.com will not work on Windows 10. It is quite popular but GOG.com will not fix it. The sad part is that a fixed version is already available on STEAM so all they really need to do is ask for the updated version.
Another instance much more like this is Below the Root. It still work on new computers and the owner of the game was not hard to track down. The issue is that the current owners are all about "Education" and are not interested in selling games.
Now it could be that these games are really difficult make work, or the owner of the rights might be really hard to find or it is owned by multiple groups, or finally it the owners may not want to sell the game.