Taiwan's mass urban demolition spree happened towards the tail end of authoritarian rule, and did in fact play a role in garnering mass support for the democracy movement.

After democracy, Taiwan shifted towards trying to preserve traditional neighborhoods or working to normalize unofficial neighborhoods and slums - basically adopting a bottom up instead of top down approach [0]

[0] - https://www.taiwan-panorama.com/en/Articles/Details?Guid=5fc...