Cost is stable, what users see is "the same".

Engineers are happier because they can spend more time on that extra round of polish that was just filed into low-priority "fix when time" Linear tickets.

QA is happier because the stupid bulk operations are handled with AI and they can focus on the hard to find stuff that tickles the QA mind in a special way =)

Same stuff, but with better (in-house) tooling and (most) people are happier. The Code Artesans aren't, but it's mostly their problem and they'll find companies that only do fully manual programming for specific niches.