Yet:
> one of the downsides is that they have to navigate parenting by themselves.
That's not true. Our families may be away most of the time, but we have a constant rotation of our parents (and my wife's Giagia) coming to stay with us. When our second kid was born, I don't think we were by ourselves for the first six months. Even today, we get someone visiting us at least every other month.
> kids a higher probability of success when they grow up.
This is increasingly becoming something we are asking ourselves. I think our kids would benefit more from being able to grow up close to their families than in a place with a culture and values that we don't really share. For us (and me specially) living in Germany has been more of a "tolerable" than a "desirable" situation. With remote work becoming a reality, I think we can have our cake and eat it too.