It seems like I have to choose between having the Roadmap feature and the Sub-task in the same project, at least by default.
If I go with the "next-gen" Scrum template, I get the Roadmap feature (but not being able to create Sub-tasks).
If I go with the classic Scrum template, I can create Sub-task (but won't access the Roadmap feature).
Can this two things be combined in any setting? If so, how?