The first was my neighbor. I’m not really sure why his parents homeschooled him. He was an only child, and strikingly similar to the character of Cartman from Southpark. Him mom was also strikingly similar to Cartman’s mom. He didn’t learn anything, as his mom was not very strict about making sure he did his lessons. He had terrible social skills and very few life skills, which all came from hobbies that he pursued. He was an intelligent kid, and is struggling today due to generally poor work ethic and few job skills.
The second family was a typical anti-government family with cult-like religious beliefs. They believed God was in charge of their reproductive systems and had way more children than they could care for. It was a huge family. The first born was able to secure a job as an airline attendant, and led a reasonably normal life. Last I heard, many of the rest had succumb to methamphetamine and/or opioid addictions and have been in and out of jail. All of them were substantially undereducated, several with severe speech impediments and none with GEDs or high school diplomas.
The last family were the kids of my family’s pastor. They were generally successful. Their parents were strict, but very involved in their kids’ education. In many ways, they were successful - ahead in reading and math. They were somewhat poorly adapted socially, but had enough relationships through the church to overcome it.
In my experience, it can be a positive thing for children. The success of the children really depends on how involved parents are in making sure their kids needs are met. Sadly, it also seems like many parents who choose to homeschool do so because they don’t personally value education.