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My take on bandit algorithms vs A/B testing:

If you have a question where the answer can be used to inform other decisions (e.g. Which is more important for our customers, price or support level?) then an A/B test will give you a clear answer that you can apply elsewhere.

If you don't really care what the answer is and just want the best option (e.g. should the hero shot be looking up or down) then a bandit is the way to go.

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