<p>It seems like v2 of Log4j has been in development for literally years.  The <a href="http://logging.apache.org/" rel="noreferrer">Apache Log4J site</a> no longer lists a roadmap, the dev mailing list seems almost entirely about 1.2 (which is appreciated!), use of v1.3 is discouraged, and the 2.0 branch is listed as "experimental".  What's a believer to believe?</p>

Well then I guess you already answered your own question, the devs have obviously stopped focusing on 2.0 builds a long time ago and have instead decided to continue the 1.x codebase.
And if you are on their mailing list, then ask them, the source of the issue.