I’ve been tempted. Something like the E65 or E80 gbw are proven workhorses, used commercially all over the world. However they’re massive and expensive. The Mini G (and now Super Jolly G) are the first times I’ve been close to purchasing.
My biggest concern (which may be completely unfounded) is that you’re taking an incredibly simple piece of technology and adding a (relatively) complex piece of technology. I don’t know how often the built-in scales go wrong but coffee shops have access to repair technicians that domestic users don’t and replacing equipment when it breaks is part of business obviously.
My concern would be that if it does fail after year one, can it be repaired? What about in 5 years? If I’m spending the sort of money we do on coffee equipment, longevity and repairability is a huge part of it for me. Another reason I own (relatively) simple gear from names that have been around for a long time. However like you say, plenty of brands with a good heritage offer them - MK, Eureka, Ceado, Mazzer etc.
I can see the appeal though. Whilst I spend a bit of time on filter preparation, espresso is still about efficiency and convenience to me so a grinder that churns out a dose in 5 seconds without me measuring it would be great.
Semi-related, it’s the same thinking that occasionally gets me considering a volumetric machine like the GS3 or even a Linea Classic AV. But that’s a lot of money to spend just so I don’t have to use a scale and press a button!