The thing with longer, steady and uncut shots is that the actor has to know how to fight, move, etc otherwise it stops looking like Jason Bourne fighting and starts looking like Matt Damon acting.

That's why older movies just went with a shaky camera and a lot of cuts in a fight scene and have the scene in a take or two, and more modern ones prefer to go all in in training, choreography and long takes and show you what a good production can look like. I personally thank Tarantino for helping bring that kind of cinema from asia.

Also, if you like that stuff, I can't finish this comment without referencing this masterpiece: https://m.youtube.com/watch?v=Bqw369ZskMk