I'm not talking about the actual code that may or may not need performance enhancements but also the limitations of 225,000 trees and only 65,000 Cims visible at one time and xx,xxx amount of road pieces, and xx,xxx amount of buildings to zone in etc.
While it's nice that people are working on opening more tiles, I hope that people will work also on increasing the limitations that CO had to put into the game due to performance issues.