Traditionally, companies with low-latency requirements deployed to bare-metal servers, eschewing the convenience and programmability of virtualization and containerization in an effort to squeeze maximum performance and minimal latency from “on-premises” (often co-located) hardware.
More recently, these companies are increasingly moving to public and private “cloud” environments, either for satellite services around their tuned low-latency/high-volume (LL/HV) systems or in some cases for LL/HV workloads themselves.