I was exploring the Catholic Hierarchy site, and noticed something interesting. Several Bishops, including Karol Wojtyla and Josef Ratzinger were appointed, as their first episcopal appointment, as Archbishop of their respective home diocese (Pope JPII was first appointed auxiliary Bishop of Krakow, then succeeded as Archbishop, and Pope BXVI was appointed first as Archbishop of Munich).
It seems other, later Bishops like Archbishop Collins of Toronto, Archbishop Predergast of Ottawa, Bishop Wingle of St. Catharines, or Bishop Henry of Calgary are more likely to move to a few dioceses, and if the Spirit calls, later on “promoted” to Archbishop.
Am I just picking the sample too selectively? Or has Church policy changed over the years about where a Bishop might be appointed to serve?