Ownable to be EIP-173?

Ownable extension is fine and seems to follow EIP-173, would it be possible to declare that this extension supports EIP-173 (0x7f5828d0 interfaceId) ?

This will be much easier to interact with smartcontracts using this extension

Which is the advantage?

to identify a Dapp can call owner() to identify who is the owner... typically when working on a NFT wallet

what would be the advantage of hiding it ?

There is a discussion on the OpenZeppelin Github, you can have a look at it:
Support ERC173 | OpenZeppelin/openzeppelin-contracts

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Thanks for pointing this, that make sense !

So just have to wait v5 :slightly_smiling_face: