Concerned, sure. But also optimistic at the same time. That same 90 minute limiting factor you mention has also contributed to bad things, like the weakening/

Concerned, sure. But also optimistic at the same time. That same 90 minute limiting factor you mention has also contributed to bad things, like the weakening/breaking of many social connections including but not limited to extended families. How many people would visit their several-hours-distant parent(s) more if it were as easy as sleeping in a self-driving bed-car to travel and waking up there Saturday morning for a weekend stay. And if the increased energy usage is among the underlying concerns, then consider that a business person traveling for work, were they able to use the sleeper-car idea and arrive wherever the next morning (wasting no waking time with the traveling), will prefer that option in numerous plausible scenarios. So such cars can also reduce the amount of energy used on other forms of travel.