Neither Praise and Worship nor music are the issues. (Some of you already said that.) The issues are much deeper. The turmoil, perhaps first noticed in 80's and 90's, really began in 1966. Then, following a long period moral decline, the nation fully turned it's back on God's law, breaking his covenant. The tide of humanism has been dragging the church along ever since. First in small imperceptible steps, now in leaps, we sold out worship for secular entertainment and self-indulgence. Soft seats and spectacular sound systems appear to satisfy most.
I came of age in the 60's and remember the turmoil all to well. The war, free love, drugs - my list goes further but I leave that part here. I agree with your other comments.
Why, is music the most critical issue in worship? Maybe as long as we entertain, we can then preach any gospel we want. Maybe truth can be hidden behind the our emotional responses. This seems to attract more converts than the truth.