Musical genre labeling conversations are abstruse nightmares. This website, while in and of itself a helpful resource, is a prime example of just ridiculous things can get. You can spend the rest of your life trying to affix the right label to every song that you hear, and once you complete your life's great work, people will pick fights with you and call you a stupid-face.
When I decided to find and listen to a bluegrass album for the first time, I decided not to get too caught up on what that actually meant. A couple of search queries for noteworthy and modern bluegrass albums brought up The Infamous Stringdusters. Their own "About" page refers to them as "Grammy-nominated bluegrass expansionists," while others refer to them as "groove-heavy progressive bluegrass," while others refer to them as simply a "jamgrass" band. Whatever, let's call Let It Go a bluegrass album.
I'll also call Let It Go great. With only 11 songs and a tight 39 minute length, nothing included here comes across as superfluous. The overall vibe is energetic and jaunty, with each song finding room for individual instruments to shine. Middlefork epitomizes this by having the band members take turns at driving the melody along. Their vocal harmonies are also wonderful, as demonstrated in that chorus for Summercamp that has drilled its way directly into my brain's pleasure centers. Even while listening to the album's more melancholy and introspective songs (like By My Side), it's hard to imagine them having anything but a great time while playing with each other.
Additionally, the video clips that I've watched of their live performances also sound great, to the point where I'm now actively interested in trying to see one of their concerts. Bluegrass is alright, I guess!