I think several things come into play regarding ccm:
1.The purpose of the church gathered. Some see that as to proclaim the gospel, and some see it as a time for mystical worship where the worshipper enters into a state of intimacy with God. Definitely, different music types will be needed.
2. The difference between congregational singing and solo singing. Definitely some old hymns and some ccm are beautiful, well written, performance numbers. Not suitable for the average untrained congregant to attempt. Often poorly done with a song leader who only THINKS she sings like a recording artist.
3. Personal taste. It really IS ok to not like traditional music, southern gospel, rap, and yes, ccm. Doesn't make one less spiritual, less evangelistic, or less "with it." Speaking only of my town, I get sick of hearing how "all the young people will leave unless we do ccm. Don't you care about the lost" ad infinitum, when the truth is we didn't start losing the young UNTIL contemporary worship began.
4. Theology. I am not a Pentecostal. I am not Word of Faith. I am not Charismatic. I am not a Universalist. I do not believe in works salvation. And yet a great deal of ccm espouses those theologies. Why on earth would I sing them?
5. Theology of style: that is, the medium is part of the method. Read "Christless Christianity" for a good explanation of why a Reformed service should look and sound different from a Pentecostal, or a Wesleyan, or a Word of Faith, etc. Do we really want people not to be able to recognize a Baptist, Methodist, Pentecostal, Lutheran, etc service unless we tell them which it is?
6. Timelessness vs planned obsolescence. Some folks believe the church should reflect the timelessness of the gospel. Others think it should chase every fad and trend.
I believe quite firmly this is something for the local church to decide. However, whatever type of music the church chooses, it should not be surprised if some leave to find an atmosphere more conducive to worship for them. And the leavers should not be criticized for doing exactly what the stayer's did: worshipping in a way that fits them. I get really bugged when someone comes into a traditional church (and it would work the other way round), works hard to get it changed to contemporary, then basically calls those that leave heathens for taking their tithe with them.