FWIW:
a few months ago I was about to buy an acoustic-electric bass, until I saw it had the BF setup. I had no experience with it and had no opinion on it, so naturally I Googled it....it took hours to sort through various sites, but eventually I came across a luthier's forum which had a megathread on the BF system. While there were a very few posts that said they thought it sounded better, the predominant theme was that it sounded no better, or even sounded worse, than a standard intonated fretboard.
So, given the difficulties in intonating/tuning it properly, then factoring in that almost every other bass or guitar has a standard tuning system ....I concluded it wasn't worth the aggravation.
Could a bass or guitar with the BF setup be converted back to normal? Probably would require a new fingerboard since the fret slots are cut in a different spot....