Interesting piece of info: several years ago I moved East. While living in fly-over America I attended a medium sized church with formal liturgy and music which has been in place for several hundreds of years. The leadership of the church decided to become more contemporary and made a Sunday a month a contemporary service to get people used to the change - modern music instead of the old hymns of the church, and some change in the order. Also dressing down the vestments. Even the choir dressed in street clothes.
The changes were quickly rejected. Attendance dropped by more than 30% on those Sundays and collections by the same. And guess who was complaining about the change? It was not the old folks. It was the 20’s, 30’s,40’s - the young families. Their primary objection was that they were raised in the church in which they loved and wanted to raise their children. The young adults liked the liturgy and music with which they were raised. So that ended the move to the modern.
We have 3 services at our church. Three. Contemp....Early Traditional (fire and brimstone, which I love) and the 11:00 which is “happy, happy, snowflake happy”. I don’t know half the people in our church.