The nice thing about being part of a small genre is that reunions are often as low-stakes as starting the band in the first place. It's not like they had to run the numbers to see if a big tour would be financially worth the effort. From I gather from the liner notes, they went on hiatus to devote more time to families and life stuff, played a few shows over the years on special occasions, and then started jamming during the pandemic and thought "this is nice".