Games compiled for SDL1 are not required to upgrade to SDL2, but games compiled for SDL1 will also not get any functionality introduced in SDL2 that could have

Games compiled for SDL1 are not required to upgrade to SDL2, but games compiled for SDL1 will also not get any functionality introduced in SDL2 that could have been transparently made possible to them if the API wasn't broken in SDL2 - e.g. supporting alt-tab, wayland, etc. Xgalaga works because the X11 library developers have not broken backwards compatibility. This is a good thing. This is what i'm referring to when i'm talking about a library not breaking backwards compatibility and what something like Gtk and/or Qt (and, IMO, SDL) should strive for. EDIT: i give a more detailed example here - https://news.ycombinator.com/item?id=19813074 https://news.ycombinator.com/item?id=19813074