Unpopular opinion: Pressuring / "convincing" non-technical family members into using Linux is bad behaviour. It means that family member is now beholden to you. They almost certainly don't know anyone else who knows anything about Linux, so when they have problems - and they WILL have problems - you are the only person they can turn to. You are giving yourself power over them, essentially for the sake of your own vanity.
As juxtaposed with the demure wisdom of issuing a public rallying cry of "don't force people to do things they're not capable of or don't want to do."
Not sure that opinion qualifies as unpopular.
@adelie … and yet, look at the other replies.