> I vaguely remember, back in 2010, when I wrote my app, you couldn't style a button consistently across all browsers. They were grey boxes in firebox, or used other OS standard styling.

I'm sure I'll trigger a lot of designers by saying this, but I'm probably not alone in valuing basic usability FAR above styling. I much rather have an ugly button that looks like 90's era Tcl/TK than something pretty that doesn't behave like I expect it to.