It's to handle multiseat scenarios where a single linux box handles multiple "seats" as in numerous monitor+input sets facilitating multiple seated irl users.
Imagine multiple kiosks in a train station/airport running off a single box in a corner. Or a library with a dozen monitors+keyboards hanging off a single box. Consumer PCs are so powerful these days it's quite practical to do such things, at least in terms of the hardware.
*NIX has historically cared about such multi-user use cases, and Linux/Libre software specifically has proudly facilitated making more use of our hardware vs. being wasteful by forcing purchase of more machines through superficial software limitations. The entire era of shared web hosting that arguably made Linux a commercial success throughout the 90s and early 2000s was a product of hosting more customers per less expensive commodity PC.
Imagine multiple kiosks in a train station/airport running off a single box in a corner. Or a library with a dozen monitors+keyboards hanging off a single box. Consumer PCs are so powerful these days it's quite practical to do such things, at least in terms of the hardware.
*NIX has historically cared about such multi-user use cases, and Linux/Libre software specifically has proudly facilitated making more use of our hardware vs. being wasteful by forcing purchase of more machines through superficial software limitations. The entire era of shared web hosting that arguably made Linux a commercial success throughout the 90s and early 2000s was a product of hosting more customers per less expensive commodity PC.