Ultra-low latency was the 5G capability that gained the greatest level of attention in the early days of standards development, when 3GPP and the wider industry were setting out to devise a wireless network that would do a lot more than just speeding up mobile broadband and making it more cost-efficient. By contrast with 4G, there was a vision to support the diverse and demanding connectivity requirements of industrial IoT applications right from the start, which led to the famous triangular vision of 5G use cases, categorized by a focus on eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications) and mMTC (massive machine-type communications). Among these, very low levels of latency seemed to offer the chance for the greatest…