Unless it's a dramatic fall, it may take longer to determine how much damage has been done to twitter. He's cut a lot of costs by sacking staff, and it may take a while before those lost staff start to bite. Twitter can coast with the technical deficit for a while.Maybe.
It's really hard to determine until Twitter has been running for a while under Elon, so we can see actual numbers and figures rather than stabbing in the dark and shouting and screaming like mental people.
I'm sure this years final quarter numbers/next years first will give a better analysis of whats really going on rather than the poor journalism and Elons tweets.