Even luthiers can be full of crap sometimes.
Mine wanted to know where I was living. While I didn't press him overly much, I did discover, over time, that this little detail can be critical.
If I was living away from the coast, the drier, warmer/colder air would help determine the characteristics and preparation of the wood to be used. The point has been repeatedly made here, that humidity is a big determinant, regarding how stable things can get, or otherwise. Climate needs to be a focus. So, if your instrument was made for conditions unlike those you are keeping it in — hard to know sometimes but you can
always make an educated guess — or if no thought has been given to the climate, in situ, at all, you're more likely to run into trouble. Other stumbling blocks will come into being too, like fret bloom — another telltale sign that not enough thought has gone into the equation.
All this is plainly most critical in a one-piece neck: less so, but still relevant, with three and five-piece necks, etc. Move away from wood altogether and all that would change. As aluminum's a great conductor, temperature differentiation's going to come into play, big time — just a guess. Not so with carbon fiber, graphite, etc. which readily insulates and so would be a wiser choice for a rapidly shifting climate/atmosphere. All my necks, all but two, are one-piece. All are very stable, in my neck of the woods. Lucky, huh. So, for me wood's good enough

I wouldn't knock back some carbon fiber or graphite but I'm not gonna go out of my way. One day, maybe
