I have a friend that is new to riding mtb and he had a budget of 2000 dollars. There is a bike that had a 3x8 drivetrain and there's a bike that has a 1x9 drivetrain. He says that the 3x8 drivetrain has more gears = better but I've told him a million times 1x9 is better because it is simpler and more clearance but he still says no but if I make it more specific he might actually buy the 1x bike but I don't know how to make it more specific. Please help me make him actually buy it by replying of how the pros and cons are and maybe a little specific too. Thanks!