I use them all the time. Perhaps too often. On the other hand, when you condition your reader to expect short scenes, and then you hit the reader with a long one, it can work to your advantage in a pacing sense. Or, at least, that's my theory.
Scene breaks also allow you more options concerning timing of events, especially when you have multiple POV characters whom you want to bring together for a final battle or something. You can interlace quick snippets of action between POVs instead of doing it in longer chapter-length blocks.
Frankly, this isn't even something I consciously think about that much. For the most part, I just end the scene when the interesting stuff is done for the time being and the characters are about to travel somewhere or go to sleep or do something else that's similarly dull.
As always, I encourage authors to play around with different techniques and do whatever works best for them.
I use them, I like them, they seem natural to me.
When I'm writing, I add scene breaks as I go. When I finish the novel, I search for scene breaks and that gives me places to add in chapter breaks.
Without scene breaks, chapters might end up being as short as one page. James Patterson gets away with it but I'm sure I wouldn't.
This is also what I do. When the story's approaching a climax, I often have a series of very short scenes to accelerate the pacing. If each of those was a whole chapter, it would just look goofy, I think.