Funny, I don't see anyone clamouring for lock-in periods with bitcoin. Or, really, any asset in the world. This stuff has been solved a long time ago with various methods of cold storage. I'd imagine hardware wallet support will be enough for most regular people. Not to mention, there's the account recovery solution and savings account. Even beyond those, there are better solutions. What more does one need, at the cost of negating all investor appeal?
Many of these "unique features" of Steem have failed. It would be prudent to adopt what has proven to work in the crypto market. There's a $240 billion market of tokens with no lockup, how much for those with 13 week walls, again?