How long would you feel comfortable not having a director at your daycare?

Long story short, the director left our daycare at the end of June, and they still haven't replaced her 4 months later. Currently, the preschool director is acting as the interim infant/toddler director - she's obviously stretched thin, but a lot of little things are slipping through the cracks (i.e. no newsletters with the focus for each week/student's birthdays, no communication about new/departing teachers or students, no fun theme days like pajama day, etc.) I've asked multiple times how the search is going, and they'll always have an optimistic answer ("we just interviewed a great candidate!") but nothing ever comes of it.