To start with, users can incorporate the most basic modules while still knowing what the software feels like, then they can continue adding modules according to the functionalities they need.
It's understandable that the robustness of the system might seem scary but Odoo works with a very friendly user interface that simplifies the process of navigation through all the different modules.
You can have greater control of the business with the available information of the systems from a single software.
Odoo is designed with a technology stack that promises not to fall behind when innovation arises. This software is constantly being updated to support newer and better practices.