I will not say either vintage bikes are obsolete or modern carbon bikes are ugly. It depends on which aspect you look at each. I have a 1986 steel bike and a 2015 carbon bike. I love both. I ride both, and I have learnt to service both bikes myself. The steel bike is now more than 30 years old, and my carbon more than 3.
Both I like, and based on different aspects. They have their merits and demerits, both the frame and the shifting/braking components.
If I am only allow to choose one to keep, I will choose my steel bike. If I am going to race, my carbon one with modern gear. Those who love steel bike with friction shifting gear claim that they possess superb riding skill. Those who love carbon love the reduced weight and index shifting aspect.
In conclusion, modern bike has overtaken the vintage. Lucky I still maintaining one.