Nothing is gonna change, if you have the same Facebook friends sharing your photos. Worse, Facebook will demand a government document to prove your new name.
I think things can and likely will change -- facebook did not exist 20 years ago, and the masses will probably move on to another platform in 20 years from now.
I'm more interested in how decentralized platforms might impact the current trend of verified accounts and use of real names. I can see a couple potential outcomes with decentralized platforms:
1) The use of pseudonyms grows further and speech gets even more divisive as people can speak without it coming back tarnish their real-life identity.
2) The use of real names grows more popular as people want to own their speech without fear of being de-platformed.
Pseudonyms have been and are again the defacto standard in the internet. Really only facebook did change that for a few years. I dont see this becoming normal.
