Certainly a system can be fully developed by some cmdrs in a month. But I think the point you were replying to remains that it will be very common for systems to be developed over long periods of time. Especially when the Trailblaizers Beta is over and the game starts moving in other directions with other activities for cmdrs to spread their time on.nope Sir - just now doing the finishing touches on a system with fully developed Indistry, Hightec and Refinery-Ecos. So even a system with some 40 Installations (incl. a Coriolis) can be done within a month (solo)...
Also consider many systems that are "completed in a month" would be sitting idle (without further development) after being completed. Possibly (probably) with unused slots. Are they really 'completed'?. Are they 'abandoned'? Just because a cmdr is happy with their system and hasn't added to it in +12 months doesn't mean it is abandoned. I think the point you were replying to was saying there is no way to determine when a system is 'complete' and what is 'abandoned', when many players are doing a mixture of activities over extended periods of time.