No two installs are alike. Being from Europe, I am also interested in UK and continental railroads.
Over the years I've collected lots of stuff. That virgin railworks folder is now more than 95 metric gigabytes, or over 88 in power-of-two gigabytes. Apparantly I have 3339 workshop subscriptions taken out? No wonder it takes so long to synchronize.
After every update or verification I check the core files and system folders in the \Railworks directory to see wether core files were updated. Especially if a new GameManager.dll has been delivered, the actual core of the game.
Apart from some new menu files in Data\Scaleform dated Sept 22, all the other files still are dated Sept 19, the day I updated that virgin install.