Well yeah, living in Taiwan is ass. The living conditions themselves are not awful but you'll get better in all tier 1 cities including HK itself and many tier 2 cities.Before 2019, some of the best talents of Taiwan moved to HK coz of better pay especially in finance. You could get as close to China and doing business related to them without actually being there.
In contrast, only rejects of HK would ever consider going to Taiwan. I mean the pay is a lot worse and due to degree inflation, it's hard to get a decent job. HKers on average had it better than guys in Taiwan.
Why would that suddenly change or be different now?
The main reason nobody sane moves to Taiwan in the long term is that it's like building your home on a volcano poised to explode in the next few years.