Malleability is opposed to institution. When everything is hyper malleable everybody will need to be trained and change management will take up a large proportion of time.
The main reason why a lot of people go with Jira is not quality of the software - but the institutional buy-in. Employees, current and prospect, know how to work with the tool.
The greater change is likely labor disruption.
Just an FYI, this isn't the case at all. I've contracted and consulted at well over 20+ business at this point, and no one knows how-to use that hot garbage.