As stated elsewhere by many - riding old bikes does not preclude carbon fiber, integrated electronic shifting, disc brake, conventional or ebikes, or such.
But it certainly has a different aesthetic, than a custom frame from a German craftsman - from 65 years ago.

And either can be a wonderful ride.
Horses for courses, it's not always a race.
And if the fast ride isn't too hilly (for an old rider's legs) this one always inspires a "hard man's effort" only slightly behind a modern superbike.