The "legacy" aspect sounds fun on paper, but it really rubs against my instinct of keeping my games in good condition; at worst, even if a game can only be played once because it's plot-driven and spoiler-ladden, I still prefer to be able to "reset" it, because then I can sell it or give it to someone else.
Maybe I'll do an exception for Charterstone if I find people to play it with, because I really like the designer of that game, but it remains to be seen.