Hi Nick,
I hate the thought of cutting down mature trees, especially fruit trees. I am also not a professional when it comes to fruit trees, so take this with a grain of salt.
I have heard (and had limited
experience myself) that peach trees in the northeast are extremely finicky. Also, I have heard if you get more than 7 years of fruiting out of them in the northeast, you are doing well.
"The future is something which everyone reaches at the rate of sixty minutes an hour, whatever he does, whoever he is." C.S. Lewis
"When the whole world is running towards a cliff, he who is running in the opposite direction appears to have lost his mind." C.S. Lewis