Same with the Beaten topics. Someone complained a year or three about posting about beating modern games on the classic board topic, but we've been pretty open about any beats are fine. It's in classic because it's assumed several of the games listed will be classic, this being DP and all.
To be honest, I don't think it would matter either way. A decade long mega thread doesn't strike me as any better or worse than just having a thread locked to each year.