The problem is that long haul trucking isn't just "most big interstates", the only advantage of long-haul trucking is the logistical flexibility, if you're cons

The problem is that long haul trucking isn't just "most big interstates", the only advantage of long-haul trucking is the logistical flexibility, if you're constrained to "most big interstates" you might as well use a train. The remote on-call strategy doesn't scale, yes it'll save some money relative to drivers, but there's a delicate balancing act involved in mitigating risk of multiple simultaneous failures, yes this might be rare, but it'll also be costly. See my response to wpietri for more about security, but with respect to warehouses and the like, they are frequently staffed by armed guards or dogs, it's also orders of magnitude easier to secure a stationary facility compared to a mobile autonomous vehicle traveling across the country. Insurance will only cover it if they can tolerate the risk. Increased availability is definitely a win, but the other advantages you listed are just alternative ways of saying "lower cost". Yes, the costs are lower, but truck driver salaries aren't that high to begin with and the cost of building out and maintaining automated trucking infrastructure will be passed on to any trucking companies that decide to adopt the technology.