Do most companies use all the Thrive modules?

No.  Most companies do not use all modules, nor would we say they should.  Thrive should fit into your plans within operations.  So, if your priority is to better manage your maintenance program, then start with that module in Thrive.  When the time comes that a safety software is priority, then leverage that area of Thrive.   If you like what you are doing within your quality team and your systems are working, do not change it.  Many companies will start with 2 or 3 areas of Thrive they want to implement in the first year.  The goal is not to use all of Thrive, the goal is to use the parts of Thrive that makes sense for your company.