I am not a seller, but if a seller is on MP have they been able to use/connect with Classic or only Seller Hub ?

Just wondering, because if a seller already on MP has still had access to and use of Classic, doesn't that sort of throw eBays 'can't be used for MP' out of the water ?

Just a question, not for or against any of this as I have no experience of it at all

My store lost the Classic view yesterday. My non-store account which is on MP (but was registered a month after the store account) still has it. As does this one which isn't going onto MP.