> An attempt to modify UNIX to overcome all of these deficiencies would have taken longer than designing a new operating system with all of the needed capabilit

> An attempt to modify UNIX to overcome all of these deficiencies would have taken longer than designing a new operating system with all of the needed capabilities. This turned out to be essentially correct (see NeXTSTEP, Mac OS X, Linux...) Nevertheless, Unix was also available for the Lisa.