What to automate and what to leave manual — and why 'automate everything' kills the suite
'Automate everything' turns into a red suite nobody trusts within six months. A first-person take: the test we fixed for half a year when we should have deleted it; why an autotest costs not 'to write' but 'to maintain for years'; what's worth automating (stable, frequent, expensive by hand, deterministic) and what to leave to a human; the pyramid as a decision calculator; why a flaky test is worse than a missing one, plus an 'automate or not' checklist.