I have the Niche for 2 years now and with the ACS EVO Leva you can use light roasts as much as you want… just tweaking the PIDs. Also I think Niche grinder is awesome for lever machines, since it’s fines helps with the extraction style lever pressure profiles applies and the higher water flow that usually they have.
For pour over, otherwise I find it always a passable grinder… clogging filters most of the time (used many different brands, with similar results).
Recently got a Fellow Ode and got Gorilla burrs in it, and V60 are next level. Still with some good sweetness and body, but clearer and more balanced… (and an obvious improvement on the clogging thing).
Also tried some espresso with the Ode and the Gorillas, and being also really tasty and notes appearing more clear… Niche still wins.
So, all of this is also to point out that grinders also have to be paired with a machine, and maybe pulling a standard shot with a Sage is not the best for the type of grinding a Niche delivers. I’m pretty sure playing with that Sage PiD, preinfusion parameters and some pro-barista mambo-jambo you can have a really good light roast espresso.