It very much depends on what you mean by "track". Jira is an issue tracker, so any issue you put into it is tracked.
A lot of people using Jira track a lot of their stuff outside Epics and Stories - they create issues of other types or issues that are not linked to Epics. Even my own example - our main Jira system is used for almost everything, and a very quick search for "epic link is empty" returns 97% of the issues that we're tracking in there.
So, I think the question is "what are you wanting to "track"?"
Hey there Cloud Community members! We’re excited to give you the first glimpse of the new home for business teams on Jira — Jira Work Management. Jira Work Management is the next generation of J...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events