About a month ago I flipped the default for accessor generation to Prefixed:
I am intending to soon remove support for raw accessors completely. There are now only two remaining dialects in-tree that haven’t been flipped, linalg and flang codegen (which ideally will flipped shortly). I’ll be removing support in about a month (sometime early November) to give down stream users a bit more extra time to update (so please do this!).