Two sets of my grandparents use Mint ever since, after two decades, I just couldn’t be bothered to give Windows tech support anymore. It wasn’t much of a “conversion” since they weren’t really aware of it (and after about a year, when it came up in conversation, remarked something to the tune of “That’s Linux then? That’s nice.”). And you know what, that’s what a good operating system should be - invisible to the user. The general user doesn’t care, they want to do stuff unrelated to the OS, they just happen to need an OS in order to do it.