Will jailbreaking 5.6.1 ever be possible?

I read here that you can't jailbreak a Kindle with 5.6.1 unless you physically open it up. Is this because there hasn't been enough time for someone to have written code for 5.6.1 yet, or because there are intrinsic new problems with the latest firmware that will make it unlikely that there will ever be an easy way to jailbreak it?

Is it possible to downgrade to an earlier firmware version from 5.6.1?


TIA for any replies. I really like this forum.