The reason most people don’t want to get ROC ID is because you have to renounce your original citizenship (unless you have Chinese DNA). But it seems commonwealth countries allow you to get your citizenship back after renouncing - but one time only.
Far as I can tell, yesterday I became the 1st (non-Chinese) person to naturalise in Taiwan and get back my British citizenship via having the renunciation overturned.
'Course they don’t tell you that in the brochure.
Pity US citizens can’t do this - probably some kind of Uncle Sam position like “either you’re with us or against us”. Time to lobby your congressmen, guys.
However, many other countires do allow you to get back citizenship after renouncing if remain stateless for more than 6 months. A protracted period of being stateless is a dead certainty if you want to become Taiwanese, thus it may be possible for citizens of many other countries (other than commonwealth) to acquire dual nationality thru naturalisation.
Go for it, all you would-be dual citizens!