Boomer churches removed the last remaining symbols, images, and rituals from the church as they built new suburban churches that reflected the corporate culture of affluent functionality. They built churches for one cultural subtype of Boomer, the suburban consumer of religion who is also a corporate achiever in his or her vocational life. This corresponded to a gospel of personal fulfillment and megachurch identification.
Too general a point to be useful. The old mainline churches have maintained all of this. They struggle with attracting sufficient congregants to maintain themselves financially