Right, so this was exciting to see in my Twitter feed early this morning! I've watched it, and I'm grateful to Hoffmann for the work he put into it. One could quibble about which grinders (or versions of grinders, or accessories) were left out, and one could drill down on certain details, but I'm not going to do that. Instead, a quick take:
What rang truest to my ear: Hoffmann's comment to the effect that once you're in this rarified air with respect to hand grinding, "upgrading" from one unit to another is much more about feel/ergonomics and other related factors than it is about cup quality.
Where I think he missed the mark: I've already made this point on Twitter, but it's worth repeating: framing Comandante as having "kickstarted the whole high-end grinder thing" is wrong. Orphan Espresso was first out of the gate in the modern era with their Pharos (released in April 2011). Rosco came soon afterward, and that was the only real [though prohibitively expensive] alternative I could consider for filter coffee when I got my newly released Lido 1 in March of 2012. IMO Orphan Espresso is responsible for the subsequent explosion of interest and innovation in this domain. It's great that we have so many options now when shopping for a hand grinder, but let's not forget how we got to this point.
"It's not anecdotal evidence, it's artisanal data." -Matt Yglesias