With the growing increase in hardware capacity, both in processors and memories, plus the rapid advancement and development of GNU / Linux systems, increasingly robust and with better resource management, a high number of tasks can be done on a computer. tasks without getting slow. However, when using the standard configuration of a desktop PC, only one user can use the computer at a time, limiting the effectiveness of the system as it remains idle most of the time, it keeps its resources idle.
With the multi-user configuration, several users can share the resources of the same computer, so a greater percentage of its total capacity would be used, thus having a better use of the system.
For example, in the traditional scheme, if someone is just using a web browser or writing a letter in a word processor, or working with a spreadsheet, or with a billing, inventory, or accounting program, the team it is wasted, as a large part of the system's capacity is unused. But with the multi-terminal configuration, other people will be able to use the resources that would otherwise be idle.
However if someone is using all the resources of the machine (with 3-D games or something like that), the other users will have a very slow system.