AFAIK the only difference between this and /servers is that /servers/details is missing some things (e.g. routerPortName) that exist on /servers servers, but they have this "hwinfo" property. Even in APIv1 /hwinfo was read-only and now that endpoint no longer exists (removed in v2). "Hwinfo" as a concept has sort of passed into obscurity as new servers can't have it as of at least a little more than a year ago.
Remembering to update an unused endpoint is difficult, and actually doing so is annoying. As a result, the object definitions between /servers and /servers/details have drifted to the point that I'm not sure how the latter could possibly be useful anymore. Which will likely continue unless we just get rid of it.
