POTUS elect said in the TV interview that "One China" is something to be negotiated. Whether any negotiation happens doesn't matter.
All it matter is now the entire world knows One China is negotiable, despite China saying it isn't. The whole world knows US and China do not agree on One China.
It follows that unless China is willing to renegotiate one China, then there is no one China.
This is the end of One China. It's not a question of "if".
The potency and the entire point of coining the mantra known as "One China" is that nobody would even question the definition. One is only allowed to utter the mantra. Once you question it, or even suggest it can be negotiated, you break the spell. This is the nature of every mantra. By simply questioning it, there is no One China anymore.