Hmmm, I'm a bit confused of their conclusions (encouraging use) given some of the really damning caveats they point out. A tool they themselves determine to need such careful oversight probably just shouldn't be used near prod at all.
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Naturally this doesn’t factor in things like human obsolescence, motivation and self-worth.
I've been thinking about this as I do AoC with Copilot enabled. It's been nice for those "hmm how do I do that in $LANGUAGE again?" moments, but it's also wrote some nice looking snippets that don't do quite what I want it to. And many cases of "hmmm... that would work, but it would read the entire file twice for no reason".
My guess, however, is that it's a net gain for quality and productivity. Humans make bugs too and there need to be processes in place to discover and remediate those regardless.