But totally, totally worth it.
Subtitles as muxed with the current build of MultiAVCHD are now confirmed to be PS3 compatible, and thus (theoretically) compatible with virtually any BDMV spec approved Blu-ray player.
Getting the seamless branching to work? Now THAT'S another story!
A new age is upon us, ladies and gentlemen. Now, to start ordering BD-R GB50 in bulk...