Some look odd, some more sleek, but he plainly stated they are lighter and faster than much heavier bikes on the market and are fun and a pleasure to ride.
He is not alone. i made the jump to carbon fiber bikes about 2 years ago. I am no mountain biker, but I do love a nice and comfortable bike that handles well. The trick is finding the bike style that fit’s your needs. Comfort, speed, whatever your pleasure or challenge, they have some really cool bikes on the market these days.
Carbon fiber might be an option.