I can't believe its been 30 years either. Where did time go?
I have mixed feelings on Lennon. First, he certainly was one of the greatest musicians ever. The one thing that has always bugged me about Lennon was he was such an ass to Julian, from what I've read. I remember an interview with Julian where he said the tv was broadcasting this million dollar Christmas that John and Yoko gave to their son while he and his mom were living in poverty in England.
From what I heard and read his relationship with Julian (b. 1963) was rocky, because Julian was a toddler during the peak years of Beatlemania and John was out of the house a lot, and as soon as that ended, John divorced his mother and took up with Yoko, and after that their contact was not often. However it was not totally nonexistent, John did make some efforts to spend time with Julian and was by most reports showing more interest in him in later years
Obviously John's relationship with Sean (b. 1975) was very close, since he essentially quit working for about five years to stay with him.
From many different reports, Sean and Julian are actually pretty good friends.
Part of the issue, is Julian has no inherited right to "John Lennon" either artistically or financially. Yoko snatched everything for her son, dismissing Julian. She gave him a one time lump sum of money with it legally binding that he can never reveal the amount.