I wish that the half-width 10" rack was more popular in the US. I got the impression that they are more popular in Europea.
It should be a good size for home networking gear and small servers. Also, it should be possible to mount 10" device in 19" rack. I don't think it is possible to mount two together.
Back in the day some people tried to go the other way. Half depth servers that were light enough to fit into musician's audio racks, which also tend to be rather small affairs of 6-12 units tall. Noise however is often the problem with these things. Substantially because the 1-2u height leads to comical fans.
I suppose that servers would tend to be taller in the half-width racks?
agreed, and it should be great for form factors in the range of apple tvs, mac minis, soho-size network switches, NUCs. If what you want is a homelab cluster, a 19 inch rack seems needlessly large. If only this 10 (or is it 10.5?) inch rack were a more standardized form factor, with gear designed to slide right in and out of it.
It should be a good size for home networking gear and small servers. Also, it should be possible to mount 10" device in 19" rack. I don't think it is possible to mount two together.