When we attended St. George Church in St. Paul on vacation, the regular priest was on vacation.
We noticed immediately that the priest did nothing in Greek, a bit of a surprise to us, but we didn't think much of it.
Turns out he was one of the priests from Holy Trinity Orthodox in St. Paul -- serving in the place of the vacation priest. It was a joy to see that a priest of another jurisdiction was able to serve the Divine Liturgy. Now, that is a contrast for me: when I was a Lutheran pastor, one in the LCMS did NOT have pastors from the ELCA or WELS (Lutherans understand the different letters, they are different synods, different juridictions) serving, and oft times one only had select pastors within their own synod serving.
Something different for me, but certainly a joy! It is also a joy to see priests from various jurisdictions joining at special services and at Divine Liturgy.