Services should be injected into WikiImporter. There is a fallback provided in the constructor. All usages should start injecting the services into WikiImporter or start using the WikiImporterFactory service. The fallback to global state provided in the WikiImporter constructor should be hard-deprecated and eventually removed.
This is a follow-up task to https://gerrit.wikimedia.org/r/c/mediawiki/core/+/691341, where dependency injection is added for the WikiImporter service. The patch isn't merged yet, thus I stalled this task.
Intuitively no, as this task isn't about the dependency injection itself, but rather about the removal of the fallback to global state. Maybe my task describtion doesn't make that clear.