I've been trying to convince my players that they should let me run a short adventure using O.L.D., but they don't like it being a little underpowered, in comparison to what we've been running for the last few years (D&D 5e, for reference). O.L.D. also needs some sandbox-y adventure paths; War of the Burning Sky, for all that I like it's themes, is too mass combat heavy, and Zeitgeist isn't sandbox-y enough (I've talked about this before, on other threads). Perhaps those To Slay a Dragon and To Slay a Vampire might be fitting, but I've yet to have the opportunity to read them!
I've been tempted to write one myself, actually, but don't really have the time! Never enough time!