For the Tempest between 156 and 165 there are small changes but not so many except one that is important for the power booster if used on batteries (and only technicians can upgrade those)
For the hub the same, most things are cosmetic and more internal evolutions. If you have no problems no need to ask for upgrades. You won’t get any new features or surprises except if you use the power booster on batteries. Functionality is equal.
Hubs can be upgraded by support but again nothing new to expect. And indeed new devices come with latest which is normal. While configuring them, same effort to install any version 