Version 1.4 development wrapped up in May, with workshop blueprint collections as the last feature to be implemented. Still some tweaks and optimizations were tested and implemented, again with focus on improving the multithreading usage of the game, although most of the new ideas won't be put into use until 1.5 arrives. The current 1.4 beta will be made the default version and 1.4 will officially end its development soon.
https://carloscarrasco.com/nimby-rails-may-2022/