Regarding the 'Mobile Charging Cable' and the trailer hitch receiver. (currently have 2018 XLR 100d)
I use the mobile charge regularly. Why? I pay ten cents per kilowatt-hour for electricity here. Chump change. Public chargers of any sort are in the forty cents range. And they're probably paying a corporate rate of six cents. I only use superchargers when I'm on a longer trip. And, I'll calculate how much power it'll take to get home so I don't line someone else's pockets with over-priced electricity. So, no, I'm happy to charge at home. Really. Back the car into the garage, plug it in, and forget it. Easy Peasy. Did I mention that I'm of Scots heritage?
I use the hitch for my bicycle rack. I do a lot of cycling and haul the bikes around a lot. If the car had not come with a receiver I would have installed one myself (like I did on the Lexus Rx400h). When I bought it I asked the SA if I could install a receiver. He asked why, since the package I ordered came with one installed. So, I'm happy to have it. Really.
For all of the problems that I've read about here (good lord, I feel for all of you and remain apprehensive about my delivery, should it ever occur. New XLR six seater ordered January 29, 2021), I have to say that my current X is easily the best car I've ever owned. Safest, most reliable, most fun to drive..... Really.
Bob