less things to go wrong. This gives you benefits all the way up the dev stack. Changing an integration test from needing its own db server installed to just a c

less things to go wrong. This gives you benefits all the way up the dev stack. Changing an integration test from needing its own db server installed to just a couple of files on disk is a big difference in complexity. You can probably run that test with just a local disk almost infinitely entirely deterministically, conversely as soon as you go onto the network all bets are off. Granted, if you already have the tooling its less of a big deal but if you don't then you need the tooling, e.g. your build and test machines need to have access to some sql installation somewhere and that the process of maintaining that can be a flaky one.