Northern climates...... some amount of a slower deteriation of your standing rigging
Second thought... do you know if its had some amount of time out of the marine environment? (stored on the hard for example)..... My point is, years are only one measure.
Your 35 years could have been hard service ..... or who know what. Inspect it and then inspect it again.
Many things can go bad on a boat. Don't obsess about every little thing that can go bad. If you do...... You will never sleep again!
Age is only one measure.
Just my opinion...... and yes, I have an older boat that I trust and enjoy!