Remember, even with ADS-B fitted, when you fly in uncontrolled air space (most of the time for small planes), you still only get traffic information
You will get
surveillance-based traffic information, unlike now if only transponder equipped and outside SSR coverage, where you only get traffic info based on pilot estimates.
Interesting how the "Current percentage of flights fitted" on the RHS of this page jumps significantly when updated every few weeks:
Automatic Dependent Surveillance Broadcast | Airservices