I strongly disagree. Gradle is extremely buggy where it matters the most. For instance, if I cancel a build part-way through and then run it again, gradle assumes that the in-progress JavaCompile task is completed, and proceeds to generate a Jar file containing resources but no classes. To fix this, I am forced to make useless changes, or clear my entire user-level gradle cache.
No, running `gradle clean` only cleans the project-level cache as far as I can tell. It leaves the user-level cache untouched (as far as the issue is concerned). Not sure about that flag you mention though. I'll have to look into that.
