The POSIX shell, like the 1988 version of the Korn shell before it, is able to operate with minimal memory. In the case of ksh88, it was able to be compiled in

The POSIX shell, like the 1988 version of the Korn shell before it, is able to operate with minimal memory. In the case of ksh88, it was able to be compiled into a 64k text segment which was the maximum allowed on Microsoft XENIX running on an 80286. This is a place that Powershell cannot go.