Comment by pjmlp

It isn't, the haters are the ones that don't get that there are many OOP flavours, mostly they only learnt one way and naturally everything is like that.

The original VB and Self are two other well known examples where there is no inheritance support.

Also most Lisp systems inspired in The Art of Metaobject Protocol tend to focus on multi-methods, instead of inheritance, to change current behaviours attached to structs.