Hive is more reliable and more decentralized, though it is relativity new, but it has a lot potential and advantage over steem in term of value and usage.
We should just abandoned and forget about the whole ideas of steemjet/hivejet. We can improvise and come up with another fine name to give it. Maybe HIVErocket will do this time around.
We should leave steem project for steem and hive project for hive. Not to migrate since it is not an application. The number of users will determine which one will be successful.