A discussion between two techs centers on the relevance of SCSI interfaces, with one asserting that SCSI is outdated compared to SAS and SATA, while the other argues that SCSI has evolved and remains applicable in modern computing. She highlights that SCSI now supports serial interfaces, uses TCP/IP for transport, and is still marketed by some motherboard manufacturers with PCI Express. Additionally, SCSI Ultra-5 now supports 64-bit data width, unlike LCD monitors which operate differently than CRTs.