Definitely not! There will most likely not happen any major updates that change any of the big aspects of the game, which will interfere with the content of the guide. In March 2019 Valve made an update that was major for the economics of the game and that has been accounted for in the guide. The guide is up to date (2021)! IF there will be more major updates that will change the basics of the game like this, the guide will be updated and we will ship out new updated versions to you for free!