There will probably be some yolo startups that deploy write-only code to production with unreviewed terraform plans -- who knows this could be disruptive -- but I'm also certain this won't be the last such story.
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All that being said: it's kind of sad because terraform is fairly declarative and the plans are fairly high-level.
Hence, terraform files and plans are the stuff you should review.
Where as a bunch of imperative code implementing CRUD with fancy UI might be the kind of spaghetti code that's hard to review.