I have a lot of experience with my D850. VR in a mediocre lens (such as a 24-120 or 28-300) trumps absolute sharpness in a non-VR lens for handheld shots at relatively slow shutter speeds. It becomes irrelevant at shutter speeds of 1/1000 or faster or when using a tripod, neither of which is always an option. Increasing ISO to boost the shutter speed is not a perfect solution unless done in moderation. At some point, noise and reduced dynamic range become apparent. The bottom line as far as I'm concerned is to have at least one VR general purpose lens, the best you can afford, and just take pictures. Mine is the 24-120 f/4 VR. Be aware that non-VR lenses have some limitations with a camera like this, but they can bring out the best in this camera if you use them properly.

Quite a jump here...

The main thing you need to learn is that this camera is finicky in some ways, as are all high density camera. These cameras will register every motion that takes place, both in the scene and when you hold it.

Your solutions are simple: Higher ISO, Higher speed, greater stability when holding the camera or a tripod.

I have this camera and trust me it is an incredible tool. Check a sample here. Another
sample, using severe cropping that really makes the image worthless.

As several mentioned Steve Perry is a dependable source of information.