Scenario: I want to put a "Year Established" field on the Account form. I don't know (nor need to know) the specific date the Account was established, *only the year*.
If I use the Whole Number field type, the value will have commas in it.
If I use the Text field type, the values won't have commas BUT I have to write code to ensure that end-users don't accidentally type something that is NaN. (Fine by me, but not them.)
Finally, since I don't know nor need to know the specific date, the Date and Time field type is inappropriate.
Considering all this, it would be nice if we either 1) were able to specify "Year Only", "Month/Day Only", etc., as a Date and Time field format and/or 2) were able to make number fields with or without commas.