Why is Any_getClass polymorphic in Scala 3?

[bishabosha]

its a change that does show up in the API docs, but you may wonder why was it chosen?

def getClass[A >: this.type](): Class[? <: A]

#7345 says its to allow less special casing throughout the compiler.

Could have implications for cross compile / other tools like tasty-query, Scala 2 tasty reader