Interesting posts with useful info and opinions.
Overall it is not the best idea, might even worth not doing it and naturally may not even be more seedlings growing from the same spot.
I see an online business that offers for example Gleditsia 'Sunburst' single stem and multi stem.
I don't actually see an area where there might have been a stump (does not appear to be any short single stem in the ground), they appear quite natural to me.
Since they show large fields of the same stem style I assume the multi-stem trees are achieved by some technique instead of culling?
