Just some random thinking:
I mentioned US may have two plans for Taiwan
For plan A, in 2027 USAF may use all their B-1b, B-52 and transporters equipped with palletized missiles to launch ~1000 munitions, adding ~500 missiles launched from SSGN/SSN. F-35 around China can provide another ~1000 QickSink munitions so PLA would face a crazy ‘air pressure’. It’s smart to expand nuclear arsenal firstly then make sure they can win a full scaled conventional war before focusing on Taiwan itself.
if we review plan B, it obviously depends on a prerequisite that Taiwan can resist for several months for US domestic ‘media work’ (propaganda). After all few ordinary Americans are interested in Taiwan.
Some people don’t believe it’s possible, but after analyzing Taiwan terrain I found it’s actually possible if they are resolute enough.
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The west coast and east coast of Taiwan are totally separated by huge mountains , only few tunnels and ways linked them together. They can easily break 5 of them (red marks) then no troops except air assault can reach the east coast.
The northernmost red mark ‘雪山隧道’ is most important because 1) it’s a tunnel and vulnerable to any damage. 2) once it’s closed, Yilan (a perfect position for US landing) will be totally isolated. It would be extremely hard for PLA to occupy it once Taiwan deploy enough MANPADs and ATGMs in the mountain which is a good shelter against air attack.
Taipei, as an urban area with 6 millions of people is a real obstacle before PLA can have a try to attack Yilan. If it’s residents decide to protect it to the last drop, PLA may need several months to capture it. That’s the only condition imo PLA may use tactical nuclear weapons.
Again, the best strategy for PLA is preparing to win a full scaled war firstly and that’s what are they doing.