IMO, the taylor neck is a great thing for when a neck reset would become necessary, whenever that might be. But for action adjustments for typical use, I don't see it as valuable. A saddle adjustment is simple and quick. If you don't want to "adjust" the oem saddle, you can make a new one from whatever material you like in a few minutes.
Action adjustments are, to me at least, almost a regular requirement. FOr example, if you have the action set up for your playing with med gauge strings and then you switch to lights, the action will probably need adjustment to get optimum playing again. Admittedly, if you are OK with a guitar's factory setting, it doesn't matter because it will probably work with a variety of string tensions because they are generally quite high. But I have NEVER owned any brand of guitar that did not need the action adjusted (lowered) to suit my playing.
Taking a guitar to a shop everytime you want to change the action for whatever reason just seems silly to me. Shipping it for that purpose seems even less sensible because what if you get it back and then decide it's not what you wanted?
You will NEVER hear any difference in down angle off the saddle within any normal range of saddle adjustment. If the saddle is too low THEN a reset is necessary because the neck/bridge relationship is wrong and THAT'S where the Taylor design is excellent...though folks like Martin and Collings would disagree...
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