@Michael Gibson

>>Low poly artifacts like that will just generally be what you can expect if you are trying to restrict polygon count.
The main way to make polygons adapt to the fillet's curvature better is to move the slider towards the right so it will have more subdivisions in curved areas.
I don't really understand why you refuse to do that?

Because I'm from Archviz field and usually my projects (hotels, malls, city blocks etc) contain **tens of thousands** entourage objects (which I'd like to make in MOI). even using proxies and forest packs we, Archviz monkeys, have to keep poly count discipline.
I attach a screenshot of a typical mesh from some good model maker. Notice 3-5 segments for a fillet, 16-24 segs for cylinder - no more. 24 segments for a fillet (your and PaQ's sujeestions) is not an option in my case,
https://storage.de.cloud.ovh.net/v1/AUTH_cfac7191c3a34a1e9648a2af88284d53/VP_Download_Mirror/catalogs/3D_MALL_EQUIPMENT_catalog.pdf