Thanks for the feedback! I totally agree about observational studies being suggestive but not replacing A/B tests - that’s why the main use case I listed in the blog (and how current customers have used the product so far) is “prioritization of a/b tests”, not replacing a/b tests themselves. The language around “simulating a/b tests” is just a way to try to concisely explain to someone at a high level who may not be very technical or have much experience with causal inference. Happy for suggestions on how to better convey this without over-selling!