So, unc0ver is open-source ?
Interesting. So Apple should be all over that code to see what it's using and patch the holes. Apparently, Apple does not do that.
Now the question is : why on God's green Earth did Apple unfix a fix and re-allow jailbreaking ?
Another question : how long before a patch is published that re-applies the fix, thus locking the phone down again ?
Because Apple is aware of this, and they had the fix, so I really don't see that it is interesting to go and use the unfix to jailbreak the phone since it's likely going to be locked down again at the next patch release.