WhaaaaaaatYou can absolutely use a single regular qsfp cable to connect the breakout port to another switch (assuming the other switches port is configured for breakout / 4x 10gbe).
Okay, that is cool.
Assuming I use an ICX6610 on one side and a SX6036 on the other side
ICX6610 4x 10G breakout port in breakout mode -> 40G QSFP+ cable -> SX6036 regular QSFP+ port in 4x10G breakout mode would link up with 4x 10G links?
It should then be easy to pack the 4x 10G links and another "regular" QSFP+ link into an Link Aggretation group and get "virtual" 80G bandwidth