Maple is stiffer than mahogany and doesn't deflect when tuning up/down.
I don't ever play in alt tunings, but have for a long time now kept certain guits half-step down for "those" songs: a strat, tele, a dred, for example. Well with Fenders, these are maple necks so never gave the difference any thought. But my Taylor 210 has been that half-down guit 90% of the time, and occasionally bring it up to standard. But for a few days now, I've tried my other DN with
maple neck (which is
always in standard) at half down and there is
zero felt difference in neck relief. When I go back and forth with the 210 (mahogany neck), I always felt the slight diff, but never really think think twice about it. Now I notice!
None of which is a game changer or anything ...just an interesting observation that struck my geekiness. That I can change tuning with a maple-necked acoustic and feel no difference in action, but with a mahogany neck tuning down/up changes action a hair. And for those of you who do play with alt tunings, perhaps this is a consideration for ya. Happy Saturday, all! And have an awesome Presidents-day weekend ...may you do something that celebrates freedom!

Edward