I would use only #2 and #3.
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Aspara GusI think it’s already standard. The COCA’s got over 1500 citations for it.On the other hand, Collins dictionary calls it "not standard":
GPYOn the other hand, Collins dictionary calls it "not standard":I’d say that label was outdated.
Aspara GusI’d say that label was outdated.You're probably right. I do think it deserves at least an "informal" though.