thinking more on this, i believe there are four paid features that i use.
training log (this is my preferred way to see overall ride history)
live segment “race” mode. this may be available to free subscribers depending on your device, not sure. but seeing the cross section of the segment along with your best and last times as a little virtual dot plus the time ahead or behind is cool. racing yourself, really.
fitness and freshness (pretty useless)
heat map. i enjoy making/looking at these.