Im also confused why you say China's inaction on Taiwan isnt about TSMC its about patience, but patience is running out because China wont need TSMC in 10 years. That seems to contradict itself.
The scenario where Taiwan peacefully reunifies is where they decide they want to be part of China of their own interest.
Do you think an invasion of Taiwan brings risk of a new, worse status quo? I think that's primarily why China doesn't invade. If it were possible to just achieve an easy, total victory then there is no reason to wait for Taiwanese people to change their mind about joining China.
The reason China doesn't want to is because they want a peaceful reunification. They want to wait when it's so obvious that Taiwan would lose and lose quickly that Taiwan simply gives itself up.
I agree they prefer a peaceful resolution but that would be in the form of Taiwan wanting to become part of China and deciding to reunify. It makes no sense to surrender without being forced to.