The grinder landscape has changed dramatically.
Let’s not forget the niche was totally different to the norm
Before it was sold there was no real single dose option
Now there are lots of options
From using a duo, you really don’t need static rays or knockers with it, doesn’t even need rdt.
Variable rpm is still highly debated.
I think the single biggest thing with the duo is that most are thinking it’s no different to the zero. No excitement factor. But you need to use it.
Me personally I love the flat burr profile.
I’m happy with my Evo and the way it extracts
Some people want a 60s shot, spro overs etc I’ve never really tried those types of shot imo if that’s your bag just go for a pour over