So, after inadvertently deleting my 7+ hour save of Epic Battle Fantasy 3 (for, I believe, the third time now), it occurred to me that at least one game has the option to save your progress to your account. That game being Enigmata 2: Genu’s Revenge.
I’m curious to know why so few games seem to adopt this approach, although maybe you’d need to create a different version of the game if you wanted other sites to host it as well. I imagine there might also be an issue with server space if every game had save data linked to an account.
What goes into linking a save file to an account?