I'm a huge fan of instrumental hip hop, like J Dilla, DJ Shadow (Entroducing...), Madlib, DJ/Rupture etc. I've never listened to these new YT channels the article mentions, though. To be honest, I never really thought of these artists "lo-fi". The term I hear a lot is "crate digging". These guys scour music stores for old records to find songs and sounds they can repurpose in their own music, creating something completely fresh. Are they recording much new sounds though?
Kind related, but I love early thrash metal. Slayer, Dark Angel, Morbid Angel, etc. In particular, I love that really raw production quality. Don't ask me why, there's just something about a lot of newer thrash albums, where everything is so clean and crystal clear, I just don't connect with it as much. I guess the rawness lends it that aggression which is so integral to thrash.