I have a friend in Portland, Ohio that has a Taylor that is 21 years old. He bought it used but in new condition, and has had no issues with it. He uses it all year round to heat his home, shop, and domestic water, He has replaced the usual,,,,,,, blower,, temp controller, etc, but has had no major issues.
His advantage is, he is a metallurgist by trade, and is meticulous on water sample testing, and really keeps a good eye on inspections. He is able to do detailed water analysis at the industrial plant that we both worked at. (He is still there currently) He says that is the life of the stove. He says if his ever finally goes, he will build an identical stove to replace it.
Mine is homemade,,, all 1/4" mild steel, and 245 gallons I'm very happy with it, and for the price I have in building it, if it lasts only 10 years, I will be extremely happy. I plan on a few modifications this year, but nothing major.
I think some stoves go early from users filling them with water, filling them with wood, and thinking the stove will take care of itself. Bad idea. This is a learning experience for all OWB owners.
Mark