Since when does “an” come before a consonant, NZ Herald?

Since when does “an” come before a consonant, NZ Herald?

Too good for pop, too pop for punk, too much ego for longevity.
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The word for today is… extant (adjective) - 1a: currently or actually existing b: still existing : not destroyed or lost 2 archaic : standing out or above Source : Merriam-Webster Etymology : Latin exstant-, exstans, present participle of exstare to stand out, be in existence, from ex- + stare to stand. Middle English, from