I know this is a thing and I can't change it. But I am the other grandma and it really hurts. I am resigned to not being in my grandchilds life the way my DIL family are. She is lovely, sends my pictures and updates and is always happy for us to visit but works with her mum meaning at least one overnight stay a week (due to distance) and then they spend a lot of weekends at family events. We live 5 hours away in comparison to 1.5 hours to her family so travelling to us with a toddler is more difficult.
The really galling thing is before grandchild was born her mother was totally disinterested in DIL and when she moved house while DIL was at Uni bought a house and told her she couldn't come home in the hols as there wasn't a bedroom for her. Baby arrived and it's oh we love you stay with us work with us.
Not looking for advise just having a pity party. I know my son loves me he just has different priorities now and I feel sad.