If I’m networking with other mostly-realname people for professional purposes or writing something to support my professional identity, it’s real name and what I post is carefully curated.
If I’m working on a hobby, it’s a pseudonym that someone who was really determined might be able to trace back to my real identity.
For any other expression of opinions in public forums, it’s pseudonyms all the way.
If I’m networking with other mostly-realname people for professional purposes or writing something to support my professional identity, it’s real name and what I post is carefully curated.
If I’m working on a hobby, it’s a pseudonym that someone who was really determined might be able to trace back to my real identity.
For any other expression of opinions in public forums, it’s pseudonyms all the way.