Yesterday I spent about 10 minutes removing a fretboard that had been attached to the neck with doublebacked tape. I had also clamped it down very well. It made me think. If I ever build an instrument with an opening top again, and an overlapping fretboard (which I always do), I will seriously consider just using doublesided tape to attach it. It sticks really well, and there is no real tension on that joint. And it is removeable using a putty knife.
I would be concerned about the tape dampening the vibration of the instrument.
I have never actually left that attachment method on an instrument that I have sold. But I have been tempted. While playing a double backed tape instrument, I haven't noticed any difference. I doubt the fretboard has much to do with the sound.
Anyway, you are right, in that that is too mickey mouse a way to install a fretboard. I like to use hide glue for fretboard to neck connections in the unlikely event that the fretboard needs to be removed at some future time. Water will soften up the glue enough to be able to remove it.
Speaking of glue, I was able to unglue a Titebond II joint with a little water and a liberal amount of time and patience.
One more thing, I have heard that the double back tape will loosen or slip and make a gluey mess in very hot weather.
It occurs to me the utility you gain will cost clarity of tone.
The resonating strings Do pass the harmonic to all parts of the instrument.
Tape would act as a dampener. Some amount of sustain would be lost.
Overcome that with a piezo p'up ???
Fun project ! All told, what better to experiment with than a cbg / cuke ???