MIMF

I'm curious about the method people use to deal with the area of the fretboard that is over the sound board.

I've seen the method that slopes the top down, the insertion of a wedge, the fretboard that just sort of dives down and bends, and I think maybe the Taylor method might solve that problem, too. Is there a general concensus that one way is better or way worse? Just curious.

It depends what sort of guitar you are talking about.
Generally on a steel string with careful planning, you can get the fretboard to sit on the soundboard full thickness
With a classical, or even worse a flamenco, it is much more difficult (due to the higher action requirements and lower bridge height, the neck is generally forwards of the body plane)
Currently my practice is to use a floating fretboard extension on an adjustable neck but even that requires carefull planning to work well on a classical/flamenco.

I have had good luck by bracing the area above the soundhole "flat" with no radius to the top. I put all the other braces on first while the top is in a dish. The fretboard has lined up well at a good neck angle without causing a hump at the body connection. So far so good.