On any quality built hull (of any brand), if any problems were to be discovered, I would think they would surface within a 5 year timeframe.
Also understand that there are (or were) companies in the boat business that offered lifetime hull warranties... and they are no longer in business.
So what becomes of that lifetime warranty then?
Warranties are a marketing tool as much as a protection vehicle offered to the consumer of any product.
And we're not just talking boats... Everything from homes, to cars, to washing machines, and consumer electronics... all are covered by some kind of warranty. If a company goes away, who assumes that warranty?
Warranty might be a consideration in a purchase, but I'd give more weight to other factors when making a decision to buy anything these days.