Personally, I find the latter to be more likely, though I’m not sure if this means ferrying troops and supplies across in People’s Maritime Militia boats, civilian freighters, or some combination of both.

If anything, it is interesting to think about what is in the plan(s) in some general's filing cabinet at PLA HQ for this sort of thing. Hopefully Taiwan and the rest of East Asia remain peaceful and are less tense in future decades than they are today so it never comes to that.