Generally if it's long/involved it should be an article - articles also stay near the top/first-page of the article's list longer whereas a discussion is often gone from the first-page after one day - articles can take up to a month to be published though
Seems articles were read a bit more in the past - then there was a stretch where Founder didn't publish any for a long while and seens they fell more out of favor (kinda out of sight out of mind)
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