With a hike in NY/NJ, and one in Southern Vermont finished this fall, I've hit the 80% mark on my AT section hike. Lost 2020 and Spring 2021 to COVID concerns, but got back to it this fall. I was a bit concerned that my main partner had finished his section hike, but have found several others to assist with logistics and company.
It's taken a mere 39 years. In reality, I only decided to section hike the whole trail in 2006, but had completed a couple of hundred miles already. Planning to finish to the White Mountains (mostly the Hudson River to North Adams, MA) in 2022, and from the Whites north in a single trip in 2023.