This comment nails it - anyone who has had to investigate other offerings that satisfy the needs of project management, design, and engineering will quickly find that all the other options out there are total garbage in comparison to Jira, which is why Jira remains at the top of the totem pole for what it does.
As an engineer & former manager, there are definitely things I didn't like about Jira like slowness, but everything else I investigated/used were worse in multiple significant ways.