Don't quite understand why you think it's a PITA, when it's been noted several times in this thread, and confirmed by me, that the conversion takes less than 30 minutes, and is 100% reversible.

Now, cutting down *any* sized film down to 3x4 for each and very frame in a darkroom, or even under safe-lights... now THAT is a PITA But I guess to each his own. I'll enjoy shooting stock 4x5 sheet film and 4x5 as well as 3x4 Fuji/Polaroid instant film on my converted R.B.