Absolutely, I'm 100% behind this idea! 
Implementing a Gantt or Timeline view in Tana would be a game-changer. As someone who values efficient and effective project management, I see how crucial this feature is. It's not just about adding another view; it's about enhancing our ability to visualize project timelines, dependencies, and milestones in a way that's intuitive and integrated within our existing Tana workflow.
Having everything in one place, without the need to juggle multiple apps or platforms, would not only save time but also reduce the risk of errors. This feature would bring a whole new level of organization and clarity to complex projects, which is something I believe many of us in the community have been longing for.
I wholeheartedly support this feature and can't wait to see it come to life in Tana! 
Let's make project management smoother and more seamless for everyone!
Implementing a "Dependency of" function, along with corresponding search operators and potential integration with field value functions for automatic status updates, could transform how users manage tasks in Tana. It would allow for more sophisticated and dynamic task management, better suited to the complexities of modern projects and workflows.
Given the potential benefits for project planning, task prioritization, and workflow automation, your idea certainly merits consideration and, arguably, an upvote from those looking to enhance their project management tools. It addresses a tangible need for better task dependency management in a way that could streamline workflows and improve productivity.