I was going to mention this as well. This is pretty standard musk, delete large swaiths of stuff, see what breaks, and put the essential pieces back. It's supposed to be much faster than meticulous planning.
1) Delete a system
2) 404 error
3) add the system back with a simple git command
Nuclear world
1) Delete a system
2) Nuclear meltdown causes the abandonment of the Atlantic coast
3) Add the system back over the next 20 years