I'd like to echo what the other commenters said when they say consider the education of your kids. I'm from the US, but student taught in Germany while I studied abroad. The quality of the education and the sheer amount of resources Germany gives its youth is something to be admired. They will receive a quality education, have recess, and have extra curricular activities that are holistically incorporated into their education. They will not have standardized tests shoved down their throats from a young age (though there are standardized tests in Germany but their purpose and implementation is much different), active shooter drills, and lack of resources (think school counselors, textbooks, food, extra curricular activities).

My experience is based off of working in 4 different schools in the Berlin area over the course of 6 months, so my experience in limited. German society is far from perfect, there are many valid criticisms of how they do things there. But, having experienced both the US and Germany there is almost no comparison in terms of how young people are brought up.

As far as your salary goes, I hear you. I'd like to return to Germany, but know I'll make far more money in the USA. I have heard that senior devs in Berlin can crack the 100k euro mark, though there are taxes to consider. I would still say it's worth it. You will have time to spend with your kids, you won't be worked to death, you'll be seen as a human being and not simply a cog. There are some exceptions to that, some German companies genuinely suck while some US companies are great with their work/life balance. But, your chances of finding a healthy balance will be much higher in Germany. Best of luck to you!