As your parents age you get a chance to see how they handle retirement. You may also get to see their critical thinking facilities deteriorate which, I can tell you, is very sad.
One of the things my parents get exposed to fairly heavily are stories that our entire financial system is teetering on the brink of massive depression. Often times it comes with an offer for a 'sure fire' investment that will ride out this calamity. Well if you're parents are still clued in enough to not buy the snake oil, they might miss that their future outlook is being swayed by these pitches even if they don't buy into them. My great aunt, before she passed, had a suitcase in her closet with lots of cash in it to survive the coming collapse of society.
It can be very sad to watch.
That said, a number of financial planners have moved their estimates of the 'safe withdrawal rate' from 7% down to 4% or sometimes lower. This based on the anemic rate of returns over the last decade. As a result if you reduced your withdrawal rate to 4% and you were still getting returns that could have supported 7% your retirement funds will in fact grow by 3% per year.
And finally there is the whole inheritance thing. When you have kids, anything you leave them when you pass will help, except if you live in the US your "kids" will be retired already when you die. So perhaps you leave your estate to your grandchildren, or your great grandchildren. Then the kids who chose to lower their carbon footprint by not having kids themselves get angry that they don't get any of your inheritance. That causes a family dispute and all your children stop talking to each other. It isn't a laughing matter, although it is predictable. Sometimes I think it is better to leave nothing but memories, at least everyone gets to keep all of those.