Is it just me, or do the group endurance intervals on Zwift tend to attract riders who clearly have no idea what an actual interval is, often turning whats supposed to be a controlled training session into an all-out sprint fest? Are there any intervals that genuinely focus on endurance rather than an ego-fueled, all-out effort? How do these groups manage to devote themselves to an endurance ride, yet completely disregard any notion of pacing and sustainability? Whats the point of labeling it an endurance ride if its just going to be a series of all-out sprints broken up by brief periods of recovery?