My Dad (the youngest of three) has never spoken to his biological farther who left when he was still a baby…
My aunt made contact with him a few years ago apparently, and my Dad was still not interested in knowing him, in his words “I had a Dad” (Who married my Nanna when Dad was about nine and we all knew as Grandad) “Why would I want to meet this person”… My Aunt dropped the topic straight away, I’m not sure what my uncle (Dad’s older brother) chose to do.
I’m assuming my biological Grandfather is dead now, otherwise He’ll be well into his 90’s, My Dad doesn’t seem to regret that choice not to meet his biological Dad, Obviously the rest of us were pretty curious but let the topic go.
I will say this, I love my Dad, He turned out to be a great parent IMO, soft as shite and truly loves his own family. But I do think His own Dad leaving triggered some life long issues, still not dealt with today (He’s 64 now). whether or not meeting him might have helped address some of those, or indeed made things worse I really don’t know.
But I think everyone is different and the questions you ask yourself have to be:
what do you hope to gain from meeting?
Are you still Angry?
Are you prepared to be let down/disappointed?