MS Word, Facebook, WhatsApp, Visa, they all have network effects: every user you add makes your product more compelling, thus creating a virtuous circle. You need to buy their product because other people have their product.
Ok folks, let's use Jira!
Dept. Head A moves to Dept. D, hey everyone we are going to start using Jira.
Dept D. is being merged with Dept. E, Dept and new Dept. Head J is joining. E is using some open source Kanban solution based on CouchDB, hmm, let's go to Jira - other departments are also using it and then we can get rid of the CouchDB thing!
In point of fact where network effects of Jira is concerned, I have put some effort into learning JQL and setting up my own dashboards, so when you give me one of the competitors I get grouchy. I prefer Jira or Trello - also owned by Atlassian iirc?
ISO (the standards body) has started using it, I'm sure in part because large companies who contribute to standards were already using it. The committee that I am a member of switched from Bugzilla to it.
The author points at monday.com: I used it a few years ago and it only has basic and useless integrations out of the box, even for a service like Gitlab. You either develop what you need youreslf of try to so something with Zapier.