1. Almost done-ism is when you realize you've binge-watched most of a new (or new to you) show you enjoy and voluntarily start decreasing the number of episodes you're watching in order to prolong the story (and remaining episodes) for as long as possible.
2. Almost done-ism is the opposite of binge watching.
At the beginning of the pandemic, I wanted to watch "Better Call Saul" since I hadn't yet seen it. After viewing four seasons in five days, almost done-ism kicked in and I forced myself from that point on to only watch one episode every four or five days.