It still shows up in formal writing with some frequency, but it's slowly fading away. Most modern formal writing guides usually have a footnote or some such to note that. In less formal speech, it's pretty much unheard these days.
Anecdotally, I went and searched my email archives, going back to 1992, and I found a couple dozen uses of it, all in emails I received from religious family members quoting the bible.
Despite that, I agree with part of what you say: it would be good to modernize the language.