See for example this playlist of videos of his with some videos from 2021 where he implements a terminal emulator. As he says himself, this project is not so much about terminals as it is about software development practices in general.

https://youtube.com/playlist?list=PLEMXAbCVnmY6zCgpCFlgggRkr...

See also this video of his: “Clean” Code, Horrible Performance

https://youtu.be/tD5NrevFtbU