Sorry I don't buy this. You make this sound as if you were stateless which of course is not the case or you wouldn't be able to be in Taiwan either unless you sneaked into there and are in fact working illegally.
I'm not stateless. I have a work visa. The article explains the pressure of living on a work visa (shut up, get in line, or lose your job, visa, and country). Taiwan is not "home" because I can't start a family here. Even if I didn't care about children's military service, I can't get a Taiwanese passport without renouncing my previous citizenship and going to military service myself. Taiwanese PR doesn't give children nationality, and I would lose the PR if I leave for more than 2 years.
As a British citizen, you can already have permanent residence there. Bringing a partner over has no income requirements, either proof of being together >2 years or marriage (anywhere, marriage is usually valid across countries) [1], I’ve seen hundreds of people bring their partners over to Europe. Your children will be born in the UK and have full citizenship.