Grafting apple to rowan

I am in norway and I’ve been told this has been done for a long time. While rowan itself can provide great animal feed, both from the foliage and the berries, it supposedly also facilitates quick growth in apple scions when used as a rootstock. They are also basically free, being pioneer species when a woodland is cleared. The grafting was done with a desinfected swiss army knife and painters tape to tensely press the cambrium of both plants together.