The lack of a memory card slot is quite a bummer but I guess I'll get over it.
Get a USB OTG cable. Hell, they're usually about 3$, get three or four. Once you have those, you can connect all sorts of fun things to the USB port on the Nexus. I personally have used mine for USB drives (thumb only, HDDs need too much juice), an Xbox 360 controller, piggy-back charging my phone off the Nex10's huge battery, and an EXTERNAL FULL SIZE KEYBOARD. Lolwut.
USB OTG is just great fun. It's clearly something that got slipped in by geeks like me, probably because the costs approach zero.