John M. Frame, The Doctrine of the Word of God (A Theology of Lordship; Phillipsburg, NJ: P&R Publishing, 2010), 237–38:

[The Protestant Reformers] used a very broad brush to eliminate from their theology and worship anything they considered contrary to Scripture or supplementary to Scripture. So the doctrine of the sufficiency of Scripture has served as a weapon against the imposition of extrabiblical notions on the conscience of the believer.

Nevertheless, nearly five hundred years have passed since the beginning of the Protestant Reformation, and during that time Protestantism itself has accumulated a large amount of tradition. Some of this is good, some bad. My present point is that it is just as important as ever to distinguish human tradition from the norms of Scripture and to fight any attempt to put the two on the same level of authority. Some cases in point:

. . . . Many traditions have also developed concerning worship and other aspects of church life. These concern the style and instrumentation of worship songs, the order of events in worship, degree of formality or informality, and so on. Many of these are not commanded by Scripture, but many are in accord with broad biblical principles. The problem is that church people will sometimes defend their particular practice as mandatory on all Christians, and they will criticize as spiritually inferior churches that use different styles and patterns. Often the criteria used are not scriptural, but aesthetic. People argue that this style of music is more dignified, that that liturgy is more ancient, and so forth. These aesthetic and historical criteria are often used in place of Scripture, leading to the condemnations of practices that Scripture permits and commanding of practices that Scripture does not command. That, too, in my judgment, violates the principle of sola Scriptura, the sufficiency of Scripture.

Related: John MacArthur on How to Serve Christians Who Are Needlessly Restrictive