It would be better if it was news because it would mean that it's not a very old bug with still no fix.
If you want a way to put disks into a storage array and never remove them ZFS FTW!
Look at the growing number of regulatory schema that require extremely-long-term (if not permanent) record retention (HIPAA, Sarbanes-Oxley, aspects of the US health-care reform regulations, etc.). This is something that banks, brokerages, credit unions, insurance companies, etc., have dealt with by having one or more machines running Solaris to house those records that require long-term or permanent retention. That is, indeed, the reason for the creation of ZFS (and why it has its nomenclature) - ZFS was designed to be the end-all of filesystems; once something went in, it wasn't supposed to leave. Not a bug in ZFS, but a critical feature.