Is it really worth the hype to switch to a gravel bike frame design for long distance rides, or are the benefits of improved stability just a marketing gimmick to get people to upgrade their bikes? Specifically, what are the actual advantages of a gravel bike frame design over a traditional road bike frame when it comes to stability on long distance rides, and are they significant enough to warrant the added weight and decreased efficiency of a gravel bike? Some people claim that the added stability of a gravel bike is a game-changer for long distance rides, but others argue that its just a matter of getting used to the feel of a road bike. What are the actual numbers - is there data to support the claim that gravel bikes are more stable, and if so, how much more stable are they really?