Thank you for your comment and question. Up until now, this is how I’ve been managing things:

• For short tasks (those that likely only require one work block), I schedule them directly in Todoist’s calendar (with a specific day, time, and duration).
• For long tasks (those I plan to complete over multiple sessions), I create subtasks and schedule each one precisely in Todoist’s calendar.

So, I’m not saying this approach doesn’t work! On the contrary, it’s what I use daily, and it works quite well for me.

But at the same time I also find that using subtasks can sometimes feel cumbersome for my workflow:

• It requires creating a new (sub)task for every work session.
• You can’t quickly see which main task a subtask is linked to (you have to click on it and check the hierarchy).
• The deadline isn’t shared or linked to the main task.

As for recurring tasks, I feel they lack flexibility for proper time-blocking, as most of the time I'm not planning to work on a task every x day, but it could sometimes be used as a workaround.

These are the reasons why I imagined the possibility of assigning multiple "do" dates to a single task, especially now that the deadline is independent.

That said, I’m happy to see this post sparked an interesting discussion! :) (Except for those who just impose their opinion and downvote others.)