I think it is up to the grandparents involved every time. I am a grandparent carer and two of my gs's live with me placed through the courts. This was because ss wanted me to have PR so I had to have what was at the time a residence order. They are now teenagers which brings its own challenges.
Yes, I sometimes wistfully think of what my life would have been like had I not had to bring up two families, one after the other. At worst its like groundhog day when the alarm goes and off I go on the never-ending school run. But they are my boys, or rather my grandsons. I dont think I am their mum. I wouldn't change my life.
But, and its a bit but. There are now more grandchildren in the family and I feel myself being a bit arms' length. Before I am criticised, I had my gs3 last weekend for the full weekend while my dd went away. She did tell me she would pick him up Sunday morning, but I obviously had it wrong and it was the following Sunday! I had to chase her up and he went home at teatime.
I worry more about having an extra child, but then felt guilty because he was simply no trouble at all.
I absolutely do not want to provide childcare for my dd2 though. This is so very unfair on her I know but I honestly feel I have had enough. I am 56 and tbh, that's me done. Just a grandparents perspective.