Fonts can get really large now, some where around 180 to 190 is the max size. And even at huge size they look really good, they stay smooth, doesn't get pixelated. It wouldn't throw an error so I have no way to find out the max value. 31 or 32 has always been the max size on live.
font size video
https://www.youtube.com/watch?v=jYGA5qFDqGc