There are some companies working on a secondary tank that would replace the full time spare under the rear cargo compartment but that isn't out yet. There is another company working on a swing mount spare holder on the rear. Not sure if that would attach to the hitch yet. I will say if you tow with the Lexus you wouldn't feel it. I have heard many towing boats, RVs, etc... and they have said it is one of the best towing vehicles they have had. I was cross shopping the LandCruiser but the 4 cylinder hybrid killed it for me. One other bad things about the GX is the slope of the windshield. It is almost a vertical so rock chips and replacing windshield are a common thing. The R1S rake isn't much better it seems.Great feedback. In particular about the fuel tank and unloaded range. We've done some road trips in the Rivian, and it's not bad, but it's not as great as the ICE vehicle (Audi Q7) we traded for the Rivian. We also tow, somewhat often in the summer, and we have "just enough" range to make it to most lakes and back, but it's close. Arrived home this past weekend with only 15mi of range left after leaving at 100%. While not a huge issue for some lakes, that particular one didn't pass a charger on the way there or back, so it could be a VERY large issue if conditions change. Sounds like the GX would have a similar problem based on the tiny tank. Our Q7 had a 22gal tank, so it would make 250+mi while towing without breaking a sweat.
I really like the look of the GX, and could be swayed by the reportedly higher reliability of the Lexus brand. I miss an opening sunroof as well, which is a MUCH bigger deal than I thought it would be.
I would go straight back to the 4M chassis from Audi, but I've been off road a few times in the Rivian now and somewhat enjoyed that time. I'm also now living in the south towns of Buffalo, so the 14in ground clearance is nice when mother nature drops 40+in of snow on us in a day.