Damn has it really been three years?

Only 2.

unless this path is made absolutely impossible

That’s the problem though. Taiwan clearly does not want reunification. Peaceful or otherwise. Younger generations are increasingly in favour of either status quo (de facto independence without any official declaration) or even explicit official independence. And the increasingly aggressive rhetoric and actions from China are only pushing the Taiwanese more in that direction. Consider: in 2018 support for moving towards unification was at its highest in over 15 years, but then China’s human rights abuses in Hong Kong, and more recently its aggressive military drills in and near Taiwanese airspace and waters have driven that down to an all-time low.

So realistically, there are only two paths to unification. Through China doing a complete 180 on its foreign policy posture and showing it can sustain that reversal in the long term, as well as showing it can respect human rights. Or, through force.