There could be a number of scenarios; a big old collapse is possible, but also so is a purge of the extreme elements of the party that resist change. After that a moderate government who has no guile for Taiwan can make peace and implement changes.
Within 10 yrs something is going to happen.
Taiwan is a matter of national dignity. It has nothing to do with what political party or system rules China. When the US sold China to USSR by allowing Mongolia to split from China in Yalta in WWII, Chiang Kai-Shek even thought about negotiating with Japan to end the Sino-Japanese war so that the Red Army would have no reason to enter Manchuria.