Upvote:2
In Russia, Bibles for personal reading are in Russian. One have to search to find it in Church Slavonic.
Memorized prayers are in Church Slavonic.
Prayer books, akathists are in Church Slavonic though there are some with translation to Russian. At least one 20th century akathist that I know was written in Russian.
Living of the Saints, Philokalia and other books are in Russian.
In some churches after reading of the Gospel at the Liturgy in Church Slavonic, it is repeated in Russian.
Also, when I read some 19th century writings, for example, the letters of St. Ambrose of Optina, he cites Philokalia in Church Slavonic, while in modern books almost always citation is in Russian, sometimes Gospel citations are in Church Slavonic but very rarely.