There are a lot of digital products, such as Vedic Kundali, that need fields such as place of birth, time of birth, and date of birth. Also, there are a lot of other digital services, such as phone number numerology, that need the other person to add their phone number into the form. These fields are not at all available in Flowlace, and I have been asking for this for a long time now.
Also, this is just my use case, so I am sure that there might be a lot of other use cases for these custom forms and fields.