Better or just broader? Linux as embedded system

by Andy Oram

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A journalist's projection, and a fairly optimistic one: "Three reasons why Linux will trounce the embedded market."

Technically, the most interesting reason is the second (maybe half of the second) which essentially finds the same development in embedded systems that has always happened for other computer systems: as costs go down and sizes/power requirements shrink, developers are caring less about saving a byte here and there while customers care more about features and user interface.

But what "existing RTOSes" with a "traditional, flat address space" is the author comparing to Linux? Aren't there proprietary embedded operating systems with the modern features of Linux? At LynuxWorks, they say that pSOS, VRTX, and VXWorks are all limited to that inflexible address scheme.