Not OP, but I’ve found that the older they get, the harder it gets. Schedules are all over the place, and they start advocating for things they want to do that don’t fit neatly into the family calendar (vs when you were able to choose everything for them).
Expectations for parents have also skyrocketed. Your “best” now is far different than what the 1990s parents were expected to deliver. And, of course, you love them and want to provide them everything they need, so you bend over backwards to make it happen. That’s what society demands, too.
I don’t have as many kids as OP, and I can’t fucking imagine wrangling five in the current world…😳