This thread would be a lot shorter if folks knew what the definition of "functionality" was... as framed in the original question. Function doesn't know warm, cold, pretty, ugly, or anything else. It is on, off, stop, or, go. The rest, is romance. Totally understand, as it has been mentioned throughout the thread, it just hasn't been addressed as such, from the opposite side.
There isn't a chunk of wood on the planet that will stand up to the abuse that a synthetic material will, period.
As far as rifles go, will the average, or above average, or even exceptional owner, ever put their rifle through those conditions? Doubtful. Unless neglectful. So from that point, as always, it becomes more of a mater of preference, over function. The true function of the stock is to hold the rifle together, in simple terms, a handle. Is wood "better" than a synthetic? No. But no one will really ever be put in those conditions to find out, so then it's each to their own. And there is never anything wrong with that either. Is there?
R.