the body position part is what I was hoping we'd get into in the cross / endurance/ gr thread but all yous are parts guys
Not totally!
W/R/T body position I've noted a few things:
1. I am far more confident descending rough gravel downhills on my light hardtail with sus fork than I am on my gravel bike. Partly sus fork, but mostly I don't feel like I'm leading with my beak, on the edge of doom.
2. When I was still training seriously for mtb endurance races, I did most of my road work on my hardtail (with slicks) because it gave me a body position nearly identical to my FS race bike. I felt this gained me more than doing the road work on a real road bike (though the road bike would have been far more enjoyable on the pavement).
I know. But that's what I meant when I said I do not like suspension. Means I do not particularly like the very idea of MTB.
I use mine only when absolutely necessary and when the route is totally impossible to do even on a gravel bike.
Corners, baby, corners! For me, the biggest component of mtb joy is railing corners in the dirt. Could be a remnant of my motocross youth.