When you look at what's available today... f/2.7, sharp at fully open, parfocal, zero focus breathing, fully manual zoom lenses... and what used to be... f/5

When you look at what's available today... f/2.7, sharp at fully open, parfocal, zero focus breathing, fully manual zoom lenses... and what used to be... f/5.6, sharp only when stopped down even further, massive focus breathing, prime lenses... well, vintage lenses start to look like toys.