why are people still using classic classes?

[Simon Wittber]

I've noticed that a few ASPN cookbook recipes, which are recent
additions, use classic classes.

I've also noticed classic classes are used in many places in the
standard library.

I've been using new-style classes since Python 2.2, and am suprised
people are still using the classic classes.

Is there a legitimate use for classic classes that I am not aware of?
Is there a project to specifically migrate standard library classes to
new-style classes?

Sw.