About your question, since I’ve been visiting around to different churches, I’ve noticed a couple of things. First, most of the churches we’ve visited are now using video display of the sheet music, keeping the vocal parts in play. This is different from how we started, using the display only for words. However, I spent a lot of time teaching parts as we learned new songs. Secondly, one church we’ve visited is focusing on the development of new songs in a class setting on Wednesday nights, using a praise team, to introduce new songs and help everyone learn the parts.