It would be unbelievably useful if there were built-in fields for every object (with the ability to delete), such as the ones below:
1. Updated by
2. Created by
3. Date Created
4. Date Modified
This would make my life so much easier because I wouldn't have to remember to add form rules to every single form that I create. Some of my apps have 20 for one object! I've used other database builders, and many of them have this feature. It seems so easy yet very powerful. Also, a record history that can be displayed on a live app would be HUGE!