In the Kanban board you will now be able to load more than 1000 to-do's at once for a project.
This will work with out any additional filtering for the following:
A company up to 50 staff
Those who allocate up to 10 todo items per week per staff
When planning a week or 2 ahead
When ticking off the to-do's as they get done
If there are more than 1500 cards, the Kanban board will show an error message and recommend that you use a filter.
You could hit this if you have lots of staff, or with fewer staff but each with lot more tickets-per-week.