Your summary is about right, but these can also be used to present (virtualized) nvme devices to the host computer. Imagine presenting arbitrary hardware to a h

Your summary is about right, but these can also be used to present (virtualized) nvme devices to the host computer. Imagine presenting arbitrary hardware to a host, and being able to control all of that entirely out of band from the host. Another decent comparison would be older SBCs. Going that route you could build a big storage jbod for presenting blockdevices or blob storage over a network. That’s much cheaper than building a big x86 box with big chassis, x86 cpu, ram etc. And now you have cheaper, fast, NAS for your dc full of virtual hosts.