There are a few inconsistencies between modern browsers left, but in my day-to-day so far the fixes have been quick and straightforward. The only exception is

There are a few inconsistencies between modern browsers left, but in my day-to-day so far the fixes have been quick and straightforward. The only exception is 100vw and 100vh. On desktop, building an “app” that fills the screen with a header on top and a footer on bottom, this works great. On some mobile browsers, it places the footer below the browsers navbar because the navbar is not subtracted from the pages height. I’ve had a heck of a time working around this in css, particularly because the fix for mobile seems to break desktop chrome. But compared to even a decade ago, this is nirvana.