Ask HN: With integration tests, what's the point of unit testing?

When initially putting together pieces of a system, unit testing is great. No argument there. But once you have one (or ideally many) end-to-end tests in place, what's the point of unit testing?

It would seem to me that unit tests should be removed in favor of integration tests that cover the same situations. Like a type of calcification where unit tests are created for new features and then slowly get rolled into new integration tests before the cycle repeats and new features and their new unit tests are added.

/All moot again if your integration tests take > 10 minutes to run