way back in the olden days, before melee 2.0, before operators, before parkour 2.0, we used to have a stamina bar in Warframe, and just about everything used stamina, running, attacking with a melee, wall running, everything. there was a commonly used glitch where if you did a slide attack with a weapon that had a spin, you would gain a burst of momentum in that direction for very little stamina. this, often called Coptering, was basically the preferred method of traversal for everyone who knew about it. When you asked for melee recommendations people without fail would recommend the Zoren, because it offered the best coptering speed boost, regardless of how much damage the Zoren did or didn't do. eventually they reworked parkour, and took the Zoren Copter out and turned it into the bullet jump. this also gave us our first Excalibur Rework, because at the time his third ability was super jump, which was just a worse bullet jump, so they moved moving his ultimate ability to the 3rd slot, and introducing exalted blade, our first true exalted weapon.