I thought the intial response was informative, well written, and made a great effort at answering a question to which there is no definitive answer.
That said I own a boat (well) built in 1983. She's got tons of life left in her and is well cared for by me and that'll do it for me for decades more I'm sure. I don't understand the undertones of anger for a guy expressing his thoughts. Seems out of place here