But then keep in mind one who built the replacement will become the owner of an application that business doesn’t want to pay for and that person will be cost center for the company.
That person better get marketing and negotiating skills that Atlassian has on board because that person will be responsible for the app and will not be getting salary increases for working on something that is not core business of the company.
Even if you can make LLM to do the app for you.