This is perhaps a bit too unsolicited, but you should ask your coworker how is their sleep. This kind of behavior, coupled with lack of sleep is a recipe for full blown manic episodes.

I call it "the tool maker's dilemma".

It's like being a wood worker whose only projects are workshop benches and organizational cabinets for the tools you use to build workshop cabinets and benches.

Like, on some level it's a fine hobby, but at some point you want to remember what you actually wanted to build and work on that.

Sad. Many such cases!

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