Agreed. No reports of replacing them fixing the issue.
However, it still seems like the half shafts are the problem, since the vibration goes away after replacement, but then comes back. And because lowering the car mitigates the vibration. Likely a design flaw in the half shafts. There's too much play in the system and it resonates when the CV joints are bent to extreme angles. Reducing the angles or tightening the tolerances in the shafts would likely fix the issue. Or perhaps padding the joints with more grease. Someone reported that helped.
It is also related to manufacturing tolerances on the car, since some cars don't have the vibrations. I guess their motors are located just a bit lower, due to how their frame was pressed, etc.
Another fix idea. Some shims on the motors. I don't know how the subframe is mounted, but maybe there's room to shim the subframe / motor to lower the drive unit down. I'm just throwing out some free fixes for Tesla here, to save them some $$ before they have to buy back my car.
Btw. Has anyone traded in their Plaid and received a new one that doesn't have the vibration?