LÖVE

No, you can just update your code (assuming the API changes in that way.) It won't take more than a couple minutes of find/replace in any codebase.

but what about games made people who are lone gone from the löve community

If a game is popular enough people can just simply port the game (in case the creator allows it)

but some of those who are long gone are so long gone that you can't even contact them anymore

Then either you remake the game or you just ingore it. Not much you can do about it... sadly

Or... you just use an older version of LÖVE.

Seriously, though. People who are long gone are not likely to have made a game that would be compatible with 0.9.0 anyway.

ohh well, you are right