Agree with so many posters on this thread. There’s definitely overlap and no surprise that there’s connections between espresso and audio, especially when we look at the amount of variables (conical vs flat burr, light roast vs dark roast, Hx vs single and dual boiler, milk drinks vs straight espresso, bottomless vs spouted portafilter, various baskets, RDT & WDT, group head design, etc.) at play and approach to pursuing new and different purchases.
+1 @chenry regarding cost and entry into the home espresso hobby. +1 @asvjerry for the link back to the Critical Listening and Altered States thread - definitely some similarities (ritualistic for myself regarding the process of espresso and enjoyment of end product while listening with a “buzz”).
More serious espresso nerds move on from Baratza due to the loud noise and the plastic gearbox that can fail over time.
Full circle back to audio, I have a Baratza Sette 30 with micro adjustment mod that’s now used exclusively for our Moccamaster. I specifically moved on from the grinder for espresso because of how loud it was, in addition to its high-frequency pitch level - at one point I started wearing ear plugs. Measured the decibal levels this morning: 92dB peaks (87dB to 90dB constant)!