I don’t have a pizza-hut style loading bar available, but the when some of the early morning regions were opening, the merge scripts on Europe Central were just reaching about the half way mark – so significantly more data is being worked through.
PLEASE keep in mind the above comment is not an indicator or accurate point of data to estimate how long Europe Central merges will take, as there are additional steps required to complete the merges and validate all of the work that is taking place, and these will take different amounts of time. We’ll keep providing updates to when things are opening up. Just thought it was an interesting note to share with OP!