You can even automate this with something like Percy that takes screenshots and does visual diffs at selected points in the test suite. You just have to be care

You can even automate this with something like Percy that takes screenshots and does visual diffs at selected points in the test suite. You just have to be careful about including random/date-based data in your tests or you’ll get more diffs than expected. Also not quite a substitute for someone calling out “this was a major UX change”.