It would be very useful, especially when setting up new columns, to be able to set local preferences local to the user not the developers. For example, I am based in the UK, my default currency symbol is a £ sign, and Local dates, an option on the Date field are not my local date format which is confusing and it therefore has to be changed on every single date column I set up to European.
This is the case with many field types: You are right, it is not the place where the developer is which is important but the place where the customer (us) live.
I see this problem with following field types: Number, Currency, date phone number (should be able to set a default country code).
This seems simple to do, I hope it will arrive soon.
But even with this limitation, Airtable is a great product