The closest thing I can think of to compare with this is a Chapman Stick, which typically has 12 individual strings (not paired like this guy's bass). It's played differently however, i.e., primarily by tapping. Someone with long fingers and a strong grip (like the NBA's Kawhi Leonard) would find this thing easier to play. And ... it's an absolutely beautifully made instrument! Like Peatle said, I'll stick with a 4-string, and am forced to be content with that.
Chapman Stick (being played by Tony Levin)
ACOUSTICS: Cordoba D10-CE / LaPatrie "Concert" / Takamine GD30CE-12 / Norman ST30
ELECTRICS: EP Les Paul Custom Pro / Gretsch Streamliner G2420T / EP Thunderbird Pro IV bass
AMPS: Peavey "TF" VK212 / Traynor AM150T / Fender Rumble 150
EFFECTS: Boss ME-80 Multi-effects / Ibanez WD7 wah / Grand Orbiter V3 Phaser