Don't worry about the social aspect. If they are at home you can control their social exposure and development to the right influences instead of having them socialized by teachers with their own agenda.
As homeschoolers, they learn to interact more with adults, which is how they will spend most of their lives, instead of interacting with mostly children.
Homeschooled four up to HS in the nineties, would be even more likely to do it now.
Don't worry about the social aspect. If they are at home you can control their social exposure and development to the right influences instead of having them socialized by teachers with their own agenda.
As homeschoolers, they learn to interact more with adults, which is how they will spend most of their lives, instead of interacting with mostly children.