I was wondering if there is any new/current data on the durability of
fiberglass boats, in that some of these are now pushing 50 years old ?

I realize that some variables are solid/cored; maintained/neglected;
hot/cool climate; sailed hard/marina squatters; original layup
schedule; etc., but......

if the glass is maintained with a 'proper' coat thus shielding it from UV
degradation as well as water intrusion, and was originally sufficiently
constructed to minimize mechanical deterioration such as flexing, and the
boat is not exposed to serious man-made pollutants, what would degrade the
hull, and at what rate ? Ergo, what is life expectancy ?

Does it appear that...using a car as analogy...that as long as you're
willing to maintain it, i.e. replace parts, etc., it'll run forever, or is
it like... the car's rusting and no matter what, it'll eventually be a
goner ?

That is, if it's kept barrier coated against UV and water intrusion, and
internal structures are maintained AND were originally sufficient, what's
gonna kill 'er ?

Cordially,
Courtney