Every art form changes, often at rates and in ways that cause discomfort to its devotees. But the arts also have a remarkable ability to withstand and absorb those changes, and to prove wrong the prophecies of their demise.
In all things which have a plurality of parts, and which are not a total aggregate but a whole of some sort distinct from the parts, there is some cause.
People lucky enough to live in the vicinity of an industrial hog farm are, with each breath, made keenly aware of the cause of their declining property values.
Everything that depends on the action of nature is by nature as good as it can be, and similarly everything that depends on art or any rational cause, and especially if it depends on the best of all causes.