Is this just a matter of preference or is it something else?

"Disable: "Show an image preview when you hover on a tab""

I guess personal preference?

Image preview is slightly slower and has noticeable latency, compared to the text popup that is almost instantaneous.

And it is more visually distracting. I hate UI features that interfere with my workflow. I hate most UI animations. I turned animations off on my Android phone, and now the thing just flies.