And yet, some people have paid upwards of $140K for them (crazy market).
Your whole comment is riddled with logical fallacy, considering I just said I would like to see Jeep use a similar paint process. I could also be argued that changing the paint process over to one like BMW, Porsche, and others use would actually save Jeep money. For one, they'd have less paint related warranty claims (which are expensive), secondly if you watch the videos of BMW's and Porsche's paint processes, you'll see fewer people involved during the paint process (look how many people are walking that paint inspection line in the Jeep videos checking and fixing paint while the Jeep is in motion on the line, versus TWO people involved for BMW and Porsche at the primer step and TWO people involved at the paint inspection step).
Keep in mind, the starting price of some BMWs (228i Gran Coupe - $36,600) are fairly close to the starting price of Wranglers ($30,945), and I assure you that price differential is not mostly attributed to the painting process. Some well-optioned and fully-loaded BMWs built here in the U.S. at the Spartanburg plant are quite a bit less expensive than a loaded Rubicon, let alone the 392 (a well-optioned X3 sDrive30i is in the $55K range).
But, sure, a better paint process would almost double the price of the 392...

(You know it costs $11,875 to have AEV custom paint the entire Jeep - inside and out - by hand in a custom color, right? That includes them removing basically everything on the inside and outside of the Jeep, and removing some parts around the outside of the engine bay, and then reassembling...)