Complex sentence: However, KBLX played more R&B songs than they did jazz; the ending result of this was that it gradually phased out from the era of an R&B/jazz playlist in recent years.
Split into simpler sentences: However, KBLX played more R&B songs than they did jazz. The ending result of this was that it has gradually phased out from the era of an R&B/jazz in the playlist in recent years.