I am now studying JIRA on a starter license and comparing it with Trac and Redmine.
I want to use JIRA for project management in the near future.
Please answer the questions below.
Q1. What is the reason that JIRA does not have Gantt Chart by default?
I think a project management tool is meaningless if it does not have Gantt Chart like Trac or Redmine.
Q2. Is it the main focus that JIRA is used for a Bug Tracking System?
Q3. What is the reason that JIRA does not have the concept of 'Milestone' like Trac or Redmine?
You can define a custom field using a Version Picker, but it is unclear whether you can relate
the custom field of Version Picker to the Project's Road Map.