I always use the left, because it keeps cords away from the mouse zone, and I can let the cord run straighter to avoid stress (and prevent fraying). What the hell, Apple?
It's a shame right-angle Thunderbolt cables aren't really a thing. I'm using a right-angle USB-C cable for my docked 12" MB which really cleans up the desk space.
My work from home setup has me on the left side, instead of right.
Switched sides back, it's left me alone.
It's -crazy- to think this is a real issue.