I also just never could enjoy guns without wood on them. Is plastic better for wet conditions?
Probably.
But not to a point it ever mattered to me.
I have had to re-finish my 270 and my 375 H&H because I used them both in all conditions and I found that living with them outdoors for many weeks at a time (sometimes a few months at a time) over 10-15 year periods, the finish would wear off in patches. So I have re-finished them. Some men would object to that. For them, plastic is probably going to be more to their liking. But I don't mind a re-finish now and then. Keep in mind that I felt a need to re-finish 2 rifles in my life from honest wear. All my others have not been worn that much.
As to change on Point of Impact.....nope. Never had a a problem with it.
I glass bed all my bolt action rifles. I free float and spine the barrel channels. When the finish was about 30% missing from my 375 I showed my old hunting partner Ken how I could still slip a dollar bill along the barrel and the stock was not touching. No problem.
The 2 rifles that have by far the most miles under them and the more rounds through them are the 2 above, a Mauser in 270 Winchester which is now on it's 3rd barrel, and my 375, which is not on it's 2nd barrel.
The distant 3 place winner is a Browning M95 lever action in 30-06. That one probably has about 2500 rounds through it total, and is well used, but even with many hunts and pack trips behind it, it's still ok with about 95% of the wood finish on it and probably 90% of the bluing. I enjoy shooting it a lot, and it's a rifle I have loaned 2 times when hunters had problems with what they brought out. Funny how they seem to fall in love with it after they kill game, but when you give an old fashioned lever action to some own who is used to a scope sighted bolt action they seem to be taken aback, but give them 2 days and suddenly they seem to think "hey, this thing is really cool".
But that's a rabbit trail. Most people on this thread are probably thinking about bolt rifles.
Cool thing about the M95 is that I only need to keep it clean and oiled and it works in the hot of southern Nevada, the snow of Wyoming and Montana, the rain and constant wet of northern Idaho and eastern Oregon and the high grass of Nebraska. It just seems to not care where you take it, and it puts 165 grain bullets right what the sights are.