Gimme a break - spoiled new school freestylers (j/k). You can definitely do a jump sub with no footholds. I quit riding for 7yrs and just got a SN last month so I haven't chopped it up yet - I can dive subs all day. You can also learn power 360's, marriots, superman, sprung monkeys/ballbusters, and if you want to you could also do fountains/backwards hood tricks which seem to be out of style these days. I also like to do invert subs, which is a good first step toward barrel rolls - and you can do these with lifters.
I can't wait to get my footholds in myself, but mainly just so I can learn rolls. Footholds are a fairly new development in freestyle - watch some old Larry Ripenkroeger, Scott Watkins, Lloyd Berlew, etc.