So - I only tried a modern (ie. suspension) mtb once. I rented one a whistler (not the downhill park). I went up a soft surface climb, over the top ..... and panicked, as I was going crazy fast into (what I now know is called a rock garden). I assumed that I was wrecking and going to be injured, because I was going way to fast to pick my way through it. I tried to absorb as much as I could with my arms and legs and.... there was almost nothing. The suspension took it all.
Suspension MTBs terrify me because challenging terrain is maiming terrain.

I'd rather try to get through the trails by the dog park on my road bike. I guess that's probably underbiking to the extreme. Of course, I've now been dragged into BMX racing by my kids, but that feels a lot safer.

Fully admit that I should not have been riding that trail blind that fast. That was stupid. And that I was in over my head. Except I wasn't, because I was so far within the bike's capabilities, even if it was beyond my capabilities on a rigid (my only frame of reference)