Asked by tycooperaow in CryptoDevs discord -solidity-dev channel
My assumption is that Vyper is still Beta (see the update on the compiler(s) below) and that with no inheritance, OpenZeppelin Contracts implementation on Vyper would be different.
Vyper resources (wiki post, please add/edit):
Agree with your thoughts, Andy. Also, and as far as I understand, Vyper has no code reusability mechanism (except for interfaces) which makes it a poor choice for a library of reusable smart contracts.