Quoted from extraballingtmc:
Also gaf was first to switch to ltd lifetime warranties instead of 30,40 and 50 year shingle warranties. That one really pissed me off too. Was a lot easier to explain warranties with a defined year on it.
The manufacturer warranties are pretty much BS, though anyway because most will prorate and not pay for re-installation in a large failure. Lots of horror stores on the internet.
In areas with extreme weather (where we are 110-120+ degree summers are the norm) the actual life of the roof is about half what the manufacturer says. We bought a 40 year comp roof when we built our house (upgraded from the standard 20 included with the house price) back when they were still putting years on it. The 20s in our neighborhood lasted 10 before they started shedding and our 40 started shedding noticibly last year at 20 years old. Then we had a huge hailstorm last year with giant hail I've never seen in CA. Insurance is buying us a new roof.
Been through all the same confusifications as the OP with this process. Ruled out GAF right off the bat. Looked at Owens-Corning and Certainteed came across a local roofer with good ratings that's big on Malarkey. After looking at their lines, we're likely going with the Malarkey Windsor, but the contract's not signed yet.