It’s not just the warranty, it’s the time it takes top get it repaired or replaced.
Lynskey have a lifetime warranty for the original owner, but it took 6 weeks to get mine back. Meanwhile I missed using it for Bristol Bike Fest, Mountain Mayhem and TwentyFour12.
Nicolai quote 7 weeks delivery time on a new frame, so I suspect it would be about the same for a repair.
Gary fisher took several weeks to replace a cracked frame too.
So, to add to the original question;
Is there any frame where you can walk in to a dealers with a broken frame and walk straight back out with a new one, or at least a promise of next day delivery ?
It’s normal practice with car dealers to supply a courtesy car so you can continue your journey if your new car breaks down.
It seems to be normal practice with bike dealers to just leave you without a bike for a couple of months.
Any exceptions ?