What are the downsides of root-server?
I've been using Netcup's root server, which allows me to utilise allocated resource at maximum capacity, according to their terms. This, from an layman's point of view, seems akin to dedicated servers, except for the fact that you won't get physical isolation, and the resource typically provided is smaller. I've tried to search these limitations myself, but the sheer lack of keywords to concisely describe this made it near impossible to do it. I'd like to know what are the limits of these root servers (except for the ones that are imposed by the providers), and whether the isolation is on par with the dedicated servers, especially since I've been led to believe that resource can never truly be isolated.