I bought all kinds of crap for mine. I simply can't resist wasting money:
AlloyGator rim protectors. I cannot tell you how many times they have saved my 21's. A total PIA to install. But worth it.
Blackvue dual cam. It's fun. Why not? Cranky comments aside...
Pano and rear sunshades for the hot season
Tesla gunk tire inflator and a tire plug kit. Had to use the plug kit once. Worked like a charm.
Wheel locks
Snazzy Tesla logo'd valve stem caps from China. Surprisingly well made!
Tesla blanket (couldn't resist and it's cozy), wallet, iPhone case, fob case, which has proven to be very handy, scarf (why?)
I already had a Valentine One, which I installed in the nose cone. Works great.
CQuartz Finest finish. Couldn't spring for the wrap. Would if I could.
Carbon fiber accents for the nose cone and B-pillars. Love the B-pillars. Looks classy to me. EVannex.
Scissor jack, wheel chocks
Microwave case-won't work for you.
30ft CAMCO extension cord. Really handy. 14-30 adaptor for dryer outlets. Also handy.
Second UMC to keep in the car. Otherwise, I would forget the home one...
Lloyd's Luxe mats. Very nice.
Center console. A total rip. But I really love having it.
Coat hooks from EVannex. What's up with no coat hooks???
And an unbelievable assortment of cleaning products, MF cloths, pads, etc from CarproUSA. Love those products!
I'm sure I have forgotten something...
Have a blast!