While Cardinal Sarah is advocating that the Latin Rite return, as a whole (that is, including the New Mass of Paul VI), to worshiping ad orientem liturgicum, Archbishop Cupich of Chicago seems intent on reinforcing the status quo favoring ad populum -- even extending it (at least momentarily) back to sanctuaries from where it had already been banished.
On May 30 he ordained a deacon for the Society of St. John Cantius -- his first ordination for them, and his first visit as Chicago's Ordinary to the Church of St. John Cantius. The ordination Mass was celebrated ad populum, contrary to the custom there of celebrating all Masses (whether the Traditional Mass or the Novus Ordo) ad orientem.
It is worth noting that Cupich's predecessor, the late Francis Cardinal George, celebrated ad orientem whenever he was at St. John Cantius.
Ordination Mass of 2013, offered by Cardinal George (Source):