My personal previous experience with XPEL (not the present "ultimate" product they have) did develop IMHO a different color cast to it that I didn't like on my pearl white Lexus back in the day. I had it removed for that reason IIRC within 2 years of installation. (FWIW, I used only Zymol carnauba back in those days, but can't remember the QD I was using.)
I also put XPEL on my former (rock magnet) 335i which was a dark metallic blue. The paint finish was inferior to my present MS, in that the BMW had extraordinary orange peel from the factory. That may have contributed to what I'm going to say, but the reflectivity of the surfaces with and without the film were quite noticeable in some lighting conditions. I did not do a full wrap of the vehicle, so if you did, this likely would not have been as great of a concern.
...so my net is I didn't put a film on my new Pearl white MC MS ...but I have limited problems where I live and frequent with rocks for the most part, so have elected to take my chances -- but I also know of many people (and local Tesla owners) that swear about the film and had it applied soon after delivery. I am very picky as to how my ride looks. I do suggest the film installer makes all the difference. Be sure to inspect examples of their work in person -- not just in pictures or on the net, best case on a color like your ride will be and in different lighting situations. Check areas near edges to see how they handle the film -- if it gets close to the edge and how much variability they have along panel lines. Also check where the film could be stretched by an unseasoned installer as its wrapped around corners and across odd surface contours. A good installer won't stretch the film, which produces odd wavy looks in those areas in some light. Check if you are OK with applying the film in only some areas of the car and not others, in terms of the overall look -- IMHO different colors take to the partial application better than others. Lastly, I would never, ever, do a mini (or partial hood) application -- a minimum full nose and hood, or none for me -- otherwise the line where the film ends part way up the hood becomes a trap for excess polish and dirt, so again, different colors will show that line off more than others and it would drive me wild within a few days after I washed it.
Good luck. Hope that helps with perhaps a different perspective. Many people are happy with film on their rides, including the Tesla. It's not for me now with my pearl white MC (light colors including metallic silver tend not to show off chips as easily as dark do), but I would still consider it again if I lived in an area with lots more sand, gravel, salt, etc that kicks-up, especially if I owned a dark color low riding vehicle again.
