The setting "Turn on caching (currently experimental)" enables caching the few first pages of a tag/pseud/user/collection's work/bookmark listing where no search filters are applied. We're certainly not gonna turn this off in the foreseeable or unforeseeable future, but we're currently barely testing it at all (saved for this one test).
Let's turn it on in feature tests by default. We may find new test failures in the process that require issues of their own.
How to test: none, automated.