Yes,any slight glitch at all will cause the game to mess up in later years. I wouldnt go further than 50 years on edited but could go around 300 on normal database no problem. Iv seen a save go on to the year 3000 and was still working fineSo, an edited database would be unlikely last as long as a normal database?
Still can't understand why this can't be improved. it was like this when I used to edit Champ manager 97/98.any edit to the database creates an extra file that you have to load with the game, so when you load a save with that file in it has to load the knowledge of all the edited bits aswell even if it's giving someone a 1ca boost it still affects the game as that file is saved in a different place so it needs a memory of where to get that information from.
and what you said about archiving doesn't really work as it's a case of the data would still be on the computer and it still needs to be accessed by the game, which would slow the processing time down by the fact it's looking everywhere for the files.