My best case scenario would be for TAB key to simply skip over formula fields in the record view.
This is because I rapidly add information using the record view. And these records often have formulas on some fields.
There are a few reason tab should not select formula fields in record view
- Since they have a formula the user cannot enter data.
- Since they have a formula there is no visual clue which field is selected. This means the user can lose the typing curser.