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The war's end saw the elements that had been unified under big band swing scattered into separate styles and markets. Some "progressive" big bands such as those led by Stan Kenton and Boyd Raeburn stayed oriented towards jazz, but not jazz for dancing. Much of the top instrumental talent of the period were performing in small band formats ranging from R&amp;B to bebop. The hard core dancing niche formerly occupied by hot big band swing was occupied by small "jump" bands and R&amp;B. Popular music was centered on vocalists, and a full-time big band to back up a vocalist was increasingly seen as an unnecessary expense. By 1947 the economics of popular music led to the disbanding of many established big bands. Big band music would experience a resurgence during the 1950s, but the connection between the later big band music and the swing era was tenuous.