Anyone who's used to a full-featured terminal would argue otherwise. Keystrokes like Ctrl-A, Ctr-K, Ctrl-R, etc do not work properly in the embedded terminal in linux (though their ESC variants normally do, e.g. esc-b). It may be useful for people who are used to/comfortable with a very unforgiving terminal like
command.com or a Solaris serial terminal, but it's very painful for power shell users who make heavy use of bash's editing keystrokes.