> I'm wondering what makes you feel confident about the use of linked lists in all of those components.

Of all of those mentioned I literally looked up their source repositories up and searched for obvious indicators like "linked", "list", ".next" or "->next" and then verified that I was indeed looking at one or more linked lists. Where does your confidence come from? Oh right, you already mentioned it: it's based on your experience of the projects you've worked on.

The rest of your reply is just moving goalposts, mind reading and a glaring category error. Get back if and when you have something useful to add.