Top of my head:
- child feels included, treated the same as other children
My DC have very little idea what I put on my SM. Neither of them would be able to tell you what we said on Facbook when they came along (one birth, one adopted)
- takes away the ‘taboo’ from the conversation, invites congratulating messages
You can email people for the same outcome
- let’s friends and extended family know quickly, cheaply and efficiently that your family has grown by one
You can email
- saves the well meaning but repetitive and tedious “oh and who is this, now?” conversations for the next however many months - usually in front of child. Changing it to, “oh! And you must be... it’s great to meet you!”
You can email
Seriously, there is no significant upside to putting something on SM, whereas there are many potentially significant downsides to it, including the ramifications for the wider family members who may not feel that it is a wholly positive outcome