leitch
Feelin' a bit rrranty
Good thing for bike manufacturers is even with lifetime frame warranties, parts warranties are the responsibility of the parts manufacturer, and your frame warranty doesn’t guarantee that it will work with your out of date componentry.I can understand that manufacturers take on this. Imagine having to sort out a 15 year old bike with a broken chainstay.
In your scenario, Giant (e.g.) is responsible for replacing the broken chainstay, and if they don’t have a 15y old rear triangle lying around, then you get lucky and they swing you a new Trance frame. It is not, however, their responsibility to provide you with a new bike.
So you get the choice of upgrading your components, or flogging off your brand you frame to bankroll a replacement 15yo frame off Gumtree.