This white paper offers an overview of the technical merits and deployment aspects associated with Multi-RAT Spectrum Sharing (MRSS). It draws valuable insights from the migration experience from 4G to 5G with DSS, highlighting the improved coexistence capabilities of 5G’s New Radio (NR) standard with future generations. The paper emphasizes the importance of MRSS in achieving a seamless migration path towards 6G while maximizing the potential of existing infrastructure.