I feel like there is an underlying issue here you’re trying work around. Why do you not want to update everything together?

Don’t use their software, use something like openwrt

“Q.R., using his mother’s old laptop, had unfettered access to the internet and began searching for hardcore pornography,” says the court. His mom claims this led to “pain, suffering, disability, disfigurement, and mental anguish; psychological injury; past and future love of enjoyment and pleasure of living.”

It’s not the internet making your son feel those things, it’s you.