The "Bounce" is Boxing
Every time I see someone posting a video of themselves with a "bounce-in-place" on this subreddit there's inevitably a bunch of comments telling them to stop bouncing because that's not boxing footwork.
I'm not sure if these folks get all of their boxing knowledge from watching DAZN, or because the only thing they know about soviet style is Bivol.
Whatever the case, the bouncing-in-place is boxing. It's taught and considered good form in many schools, particularly those who want their fighters in the amateurs. Pendulum does NOT need to be the massive in-and-out that you see Bivol doing on the pads.
If you don't believe me:
You can watch these kids perfecting their 1-2 in this Russian school.
You can watch Errol Spence getting beaten by a bounce stepper (Serik Sapiyev) in the Olympics.
You can watch Han v Lomachenko in the Olympics if you want to see two of them in action. Yes, Lomachenko boxed differently in the ammys.
Here is a Ukrainian youtuber explaining and demonstrating it. As you can see, it does not require large in-and-out movement, and his directional movement is relatively minor and is mostly in-place.
I have had the pleasure (read: pain) of having a Russian instructor teaching at my gym. The technique is a pain in the ass and not for me. But that guy could bounce circles around me and kick my ass any day of the week.
Now, do I know that these posters were actually taught this by a coach? No. Am I saying that it is a good style and one they should aim to adopt? No. Am I saying the videos they posted were any good? I don't know, it probably varies.
But if your immediate reaction to seeing a poster bounce is "oh, he's bouncing, he shouldn't do that because that's not what I see when I watch DAZN", please educate yourself.