Old thread, but fantastic ideas throughout--thanks to all who have posted! I just got my 2020 MS LR+, her name is Mimi. We're still finding our way for what extras we want/need.
Here's my list of stuff that I didn't find elsewhere on this thread:
Center console insert:
https://www.amazon.com/gp/product/B07R2JXTJF -- Single best "must have" that I've gotten. Due to the older nature of this thread, most folks were posting entire console ideas; my 2020 came with the console, of course. The stock "cup holder" dividers in there are useless, but there is a lot of space--cavernous, really--once those are removed, but it's way too deep for minor pen, keys, paper, whatever. Voila, this holder provides a couple of usable cup holders (12 oz can-sized, you can't put a big gulp in there) along with a tray for pens, paper, etc., with a couple of stoppers that let the cover slide most of the way closed (leaving the cupholders accessible) or all the way open or closed. Lifts right out for larger or longer-term storage items below.
Cubby drawer:
https://www.amazon.com/gp/product/B07YXN1PSP -- I don't love the gloss black, it doesn't quite match the rest of the black MS interior; I'll order another one if they ever start making them in matte. Otherwise, this takes the otherwise useless "shelf" under the touchscreen and turns it into usable storage.
USB hub (
https://www.amazon.com/gp/product/B00XMD7KPU ); thumb drive (
https://www.amazon.com/gp/product/B01MUH9BET ); 2x wireless game controllers (
https://www.amazon.com/gp/product/B07X4W9L8J ); USB power adaptor (
https://www.amazon.com/gp/product/B01N6C7U5W ) -- for dash cam & play time purposes
Fob holder (
https://www.amazon.com/gp/product/B07JW8QX3X ) & vanity tag (
https://www.amazon.com/gp/product/B01MXOVWJ9 ) -- because Mimi's all girl, and what girl doesn't like her bling??