I've seen some amazing pushback. A researcher who bellowed "I HAVE NOT FINISHED" so loud, it was like the MTV man-in-a-chair reaction from everyone else. I wasn't the guilty party that time but I could have been.
It's often said people believe women do most interrupting when the stats are very good 75% or more in mixed dialogue, is men's speaking time. (or used to be. maybe there's been a shift but I doubt it)
I do think its a combination of things. Well meaning engagement/reflection signals, "me-too" and also the tangents being struck, fleeting moments in the interupters stack of ideas. But also dominance asserting.
As an offendor, I don't mean to minimise the impact it has. I know it's not good. But I want to interrupt and intrude another one I can't handle:
"correct"
If you say this to me as I speak, you're dead to me. You aren't the arbiter of right and wrong, you aren't the teacher, you aren't the prover. If you want to assert agreement, find another way.