laonie also bought a lot of Steem and powered up. I doubt he'd be appreciative of having his investment pulled out of SP and into Steem. I know I wouldn't.
Right now many of us who bought Steem for the purpose of powering up are having to rethink our strategy. I'm not complaining, because it may be what's best for Steemit in the long run, which should increase the value of our investment proportionately. But it's still tough to wade through since the terms of that initial investment are being altered.
IMO, the idea of stripping all unearned SP and turning it into Steem is a bit onerous and alters the original appeal of the investment far too dramatically.
There is a sense in which I like this though, if SP could float in value separate from Steem. An investment in Steem would be an investment in the currency. But SP would be directly an investment in Steemit, like shares in a corporation. Steem "earned" on Steemit could be powered up, but Steem transferred in would be subject to market differences between SP and Steem.
Like you, I'm just thinking out loud. Maybe it has merit, but it's just off the top of my head.
Thanks for the cognitive exercise. :)