It will impact all of us if a china-taiwan/us war breaks out and we lose the majority of the worlds' semiconductor supply, access to manufactured goods, and face the real possibility of nuclear war.
Semiconductors are mostly fine, just Apple will blead. Not many else are using TMSC. Korea and China have huge semiconductor fabs.
And such an attack will not succeed without massive behind-the-lines sabotage in Taiwan. Extremely unlikely.