I was asking that very question! Apparently, the testnet deployment did not go so well so the devs, steemit and community devs have been looking into the issues. The issues were such that the witnesses couldn't really begin their testing.
It would be nice to hear that officially though, on chain!
I saw that in a couple of discords, seems like no lessons learned from the last testnet failure of HF20. Oh well we sit in wait and wonder mode I guess until they decide to throw us a bone of oops this is what is happening post.
I fear that it is the same as last time. There is no communication. That was meant to be the lesson that was learned. If they ain't taking then how do we know they are doing anything