As described above, there's more depth-of-field in photography now due to sensor size.
There's also more depth-of-field because we're generally using lenses that go only to f/4, instead of f/1.4.
What do you do if you want less depth-of-field?
Use a 50mm lens on your digital SLR camera.
The lens becomes about a 75mm or 80mm lens on most digital SLR cameras.
If you use a 50mm lens that has a lens opening of f/1.4, you'll have three stops less depth-of-field than your zoom lens.
You can blur backgrounds more completely.
The bottom photograph of the grape leaf was taken at f/1.4.
Note how only the leaf is in focus.
There's much more depth-of-field in the top photograph, because it was taken at f/4.
When using a wide aperture like f/1.4, be sure to focus carefully.