It feels like we're in a third wave of innovation in Unix CLI tools. The first was from BSD in the late 70s/early 80s which considerably improved the original Unix utilities, then the GNU tools rewrite in the late 80s, then there were the dark ages of System V. I give ack (and Andy) credit for starting this latest wave around 2005 but it's really taken off lately with tools being rewritten in Rust and challenging the old status quo.