I get why they want to compare Tara to Jira, but when you look at what companies actually do with Jira, then you'll hit a wall rather quickly with pretty much everything else.
Like them or not, Atlassians product integrate rather well, and you can "easily" customize them to integrate into pretty much everything else. We have Jira integrated into pretty much everything from monitoring to invoicing.
You can also customize the snot of internal workflows in Jira, per project basis. Even to the point where nothing makes sense any more.
Finding a replacement is hard, but relevant given the latest pricing changes from Atlassian. That and their idiotic prioritisation of their cloud offering. Oh yeah, and no Atlassian product has a functional search feature.