I’ve made two bikes with super long geometry. One longer than the other. Also a number of shorter bikes with the same design.
My take is that the long bikes are great at high speed and in the rough. But, they also corner well as a I stated before. Low speed corners aren’t that much harder.
Where I find they struggle is that the length makes them harder to manual and pick the bike up so easily. This makes it harder for instant line changes, hopping out of ruts etc. This reduction in pop makes them less suited to jumping.
So for racing, where all our speed matters, and quite often just hanging on for dear life to carry speed is important, than the long bike is great.
But if you’re just hanging out in the woods with your mates, finding every little lip to pop off, then a shorter wheelbase is better.
Horses for courses, I suppose…