>>715620327
>>715620952
Double jumps are useful, but dashes are cooler. It's fun to speed up and try to retain your momentum from a dash, and it can lead to cool movement tech like dash jumping in Mega Man X/Zero. That's not mentioning the i-frames you get from a dash, air dashes, and shit like the shinespark from Super Metroid or the crystal dash from Hollow Knight. Double jumps are just a supplementary mechanic to grounded jumps, and the most they can do is give you a bit more height off a jump or extend your air time.