There is, but it's no longer available using Shift+Save button. You can,
however, put it onto the Quick Access Toolbar. Right click the QAT (by
default, it's located in Word's title bar, but you can right-click and
choose do display it below the ribbon, where many find it more
useful/accessible)and choose Customize QAT. Set Choose commands from: to
Commands Not in the Ribbon. Click in the left list of commands, and tap the
S key twice. This should highlight the Save All command. Click the Add
button to place it into the list of commands that are in the QAT. Use the
up/down buttons as desired to move the Save As command to the desired
location, then click OK.