Well, with a top-of-line Traeger Timberline, Traeger is offering a 10 year-limited warranty which will cover component failure. However, it doesn't actually cover the external paint finish, which is likely to fail over that time period if the grill is left outside. So a rusty grill is not a warranty claim.

But what about the other Traeger models? Well, all the components can be sourced from Traeger and other third-party sellers. So keeping any Traeger model going for 10 years or more should be possible.

As Traeger's are made from carbon steel through, keeping rust at bay is something you would want to focus on as well as keeping the grill in a dry/ventilated environment when not in use ideally.