PRC hasn't blockaded Taiwan due to lack of capability until even 2010s. Taiwan military was credible threat against mainland due US weapons sales in 90s and PLA being broken legacy forces. Emphasis was on peaceful reunion as a matter of impotence and policy until "peaceful" was dropped last year. PLA has modernized sufficiently and developed enough industrial capacity that Taiwan can't deter PRC conventionally could going forward, so I expect increasing pressure.