10x is overhyped. With 8x you can see just as much detail because you are steadier just like an IS binocular. Most people shake 30% more with 10x.
The resolution you gain with 10x because of a larger image you lose because of shaking. You probably lose 30% resolution because you are shaking more with 10x.
Also, 8x has a bigger FOV, better DOF, and it is brighter most of the time. 8x is by in large the best birding magnification unless you do all open country birding.
This article from Tract Optics will open your eyes to the advantages of 8x versus 10x.
"Here’s a little test you can take to compare 8x versus 10x binoculars. Tack a dollar bill on the wall about 20 feet away and try to read the serial number. Start with a 10x binocular. Oftentimes, you’ll shake so much that the task is nearly impossible. Next, take up a 8x. And while you’ll still notice some shake, you’ll notice that the movement in the 10x is exponentially greater.
It’s important to understand that just because the image is bigger doesn’t mean you can verify detail. So the truth is, if you can’t hold a 10x binocular steady, you will actually get better results in the field with a 8x. The advantages of a larger image are sometimes not practical because your every movement is also magnified."