I wonder why people in the West constantly underestimate their passion for 'One China.'
It is an ingrained Chinese attitude nurtured for two millenia. Their rulers routinely sacrificed 2/3 of its population to make China one again after an old dynasty fell.
What appears to be prohibitive cost to Westerners may be totally acceptable to Chinese rulers.
China will not make a move until they can be sure that Taiwan will not take the war to them which of course they will. They may make threats with nukes but they know that if they hit us with one then it will be all over.