I think my favorite so far this year is:
Roscoe Mitchell/Weasel Walter/Sandy Ewen/Damon Smith: A Railroad Spike Forms the Voice
These three are not intimidated by Roscoe's elder statesman status and are great at pushing him out of his comfort zone. One long track that never gets boring.
Also really dug Bill Orcutt & Chris Corsano: Made Out of Sound, though that was recorded separately and not live together in a room, and Bill even added a second guitar track of overdubs. But damn it's sweet.
Other killer performances that would qualify as archival however, but not heard before they were unearthed this year:
Cecil Taylor Quintet: Lifting The Bandstand (Cecil is always a no-brainer, and this really cooks)
Evan Parker Electro-Acoustic Ensemble: Warszawa 2019 (same with Evan)
Evan Parker Electro-Acoustic Ensemble & Sainkho Namtchylak: Fixing the Fluctuating Idea