I will only speak from a Reformed perspective. The Bible is the only source of inerrant truth that God gave to the Church. The Bible contains the words of life. The Bible contains the Gospel. Those churches that relegate the Bible to secondary status have abandoned the Christian faith.
The real problem is not contemporary churches that put more effort into the worship experience and less focus on the sacred scriptures. The real problem is a systemic dumbing down of "thus sayeth the Lord"! If a church properly teach the Word of God it makes it applicable (relevant) to all areas of life. The questions that Millennials are asking today are answered in God's Word, but there are too many pastors that have abdicated their positions as prophets (preachers) in pursuit of celebrity.
The real problem is not contemporary churches that put more effort into the worship experience and less focus on the sacred scriptures. The real problem is a systemic dumbing down of "thus sayeth the Lord"! If a church properly teach the Word of God it makes it applicable (relevant) to all areas of life. The questions that Millennials are asking today are answered in God's Word, but there are too many pastors that have abdicated their positions as prophets (preachers) in pursuit of celebrity.