I would hope that the long time marriages of 20+ years are the older people.
Most of the ones you mentioned "who took a backseat," were professional, successful actresses, in their own right, no fly-by-night wannabes, who never made it and luckily landed a rich guy, so they could stop working for a living, or "try to make it in the business." They had made it. They changed their
lives to become Moms. They
wanted to take time away from work to devote time to their kids, to be a SAHM. There is no crime in that. Women do that all the time,
regardless of careers. If anything, it shows that someone can be an actress,
and in spite of that, still have the right values - caring more about others, than just being narcissists. Many
currently working actresses are taking time away from acting, just more discretely: Julia Roberts, Gwyneth Paltrow, Michelle Pfeiffer, Nicole Kidman, Meryl Streep, Jamie Lee Curtis, Kelly Preston.
I've seen many interviews where actors have just had kids say how it totally changes their perspective. They admit to being narcissists, and suddenly their child arrives, and it re-orders who they are, and what's really important in life, and it is the child and not them.
Joanne Woodward said a long time ago, even Paul had asked her why she was turning down so many roles. Joanne had already an Oscar win & 2 other nominations under her belt, whereas Paul hadn't won any, (which continued for several decades.) But, she said,
one of them had to stay home with the kids, and she knew it wouldn't be Paul. That was okay, as she DID want to be there for the kids and give them a stable home.
Maria Shriver once said her mom, Eunice Kennedy Shriver once told her, "You CAN have it all, just not all at once." So Maria took time to build her broadcasting/journalism career in her 20's. She focused on her family in her 30's. She came back to broadcasting once the kids were old enough. Now, she's had the give up broadcasting to be First lady of CA. YET, she is now a published author, also. She's not taking a backseat to Arnold.
Tracy Pollan has started to come back in roles, now that her kids are older. Other actresses have done the same thing. They blipped off the movie/TV scene for a while, then they come back when their kids are older. They have successfully integrated an acting career, marriage and stable family life.
Michelle Pfeiffer or Meryl turned down
Evita, the movie, because she didn't want to be away from her family filming for as long as the film required her to be away.
The Pinkett Smiths have said they arrange their careers to be that ONE films and the other is with the kids.
The Jolie Pitts have said the same thing.
I've seen many narcissistic people in all walks of life. They aren't only in show biz. It's about whether people have the right values in place
before marriage.
My list only included marriages where both are celebs, even though I had thought of others who are not, because I wanted to purposely show there
are successful marriages where both people are actors (even if one is no longer working - as theoretically they would
still have the tendency towards narcissism even if they stopped acting.)
I had included Camille Cosby only because Bill talked about her so much that he said people would always ask him about her. She she became kind of a celebrity in her own right.