Wonder what will happen to currently inactive accountd after the automatic migration has ended? Jason “Aldryth” Carroll gave an answer on the Turbine forums:
Accounts that have not been migrated by the time the automatic migration period ends will still have the option to migrate manually by giving us a call. I’m not sure if we will be able to migrate inactive accounts ourselves later down the road or not.
Either way, there is no account wipe currently planned (migration-related, or otherwise). If/when we ever do another wipe, we will make it abundantly clear well in advance.