Are you serious? Because I’m their next customer. Does the process have a particular name?
Are they cheaper that way?
This time around I replaced crowns that were almost 25 years old. The old ones were as Ken_H stated: get them formed and come back in 10 days to get them installed. I have pretty good benefits, so as I remember the out of pocket was similar (I think around $450 each). This time, they did the prep, scanned the gap, and later (hour?) installed the completed crown. Was in and out in under 2 hours.
Technology, you got to love it...!