Complex sentence: Current consensus among project participants holds that the use of biographical infoboxes is often counterproductive on biographies of classical musicians, including conductors and instrumentalists and that they should not be used without first obtaining consensus on the article's talk page.
Split into simpler sentences: Current consensus among project participants holds that the use of biographical infoboxes is often counterproductive on biographies of classical musicians, including conductors and instrumentalists. They should not be used without first obtaining consensus on the article's talk page.