TL;DR it's so completely customizable that it's more like a DIY project management toolkit. Pivotal and Linear have/had a more opinionated approach: "here's how you manage projects. Good luck and have fun!" Jira almost seems to push otherwise rational people to build the most baroque processes imaginable.
I love a good PM. Trust me, you don't want to be responsible for all the reporting and status updates and all that they have to deal with daily.
It's just that I've never worked with someone I considered a good PM who loved Jira. The great ones wouldn't care if we did all the planning on papyrus because they were more concerned with getting things done than documenting them in excruciating detail.
TL;DR it's so completely customizable that it's more like a DIY project management toolkit. Pivotal and Linear have/had a more opinionated approach: "here's how you manage projects. Good luck and have fun!" Jira almost seems to push otherwise rational people to build the most baroque processes imaginable.