First of all, that sounds like it sucked, a lot. But it's curable with a little preparation.
Complete Spare Tire Kits | Tesla, BMW, Camaro, Corvette, Dodge...
Just say no to fun flats
I have done 132,000 miles and counting in a car with no spare and no runflats. I have never been stranded. I have had to use the tire goo once, and have had to plug a couple of slow leaks here and there along the way with a plug kit. Kids came home from the hospital in this car, they get driven around in it almost daily.
Runflat tires are also not going to get you home on a big heavy car if you keep driving at 0psi for more than 40 miles or so. There's a reason pickup trucks, which weigh about the same as Model X don't usually offer a runflat option. Internal friction and physics make fools of all tires eventually, even runflats.
Also, and I can't stress this enough, DON'T STOP ON THE SIDE OF A ROAD WITH A FLAT TIRE. Destroy the rim if you have to (though if you keep your speed down, you won't), get the heck off the road to the nearest parking lot or exit ramp or anywhere but the side of a highway. Roadside stopping on a highway is just about the most reliable way to end up dead on the road. I've spent a lot of time in Houston, I know the highways and divided 6-lanes and such there are not always easy to ge toff of quickly when you have a problem, but please, just, don't.