It’s subtle, but they changed a lot of minor things, I think maybe because it’s using a different UI framework. Scrolling is worse (the scroll bar acts nuts and the scroll wheel usually doesn’t work very well, I these days tend to use the keyboard to scroll the middle plane) and the frame on the right doesn’t reset between stories.
It’s little things, but it makes reading through the days news a bit tougher.
The most important risk you face is if somehow mains voltage ends up contacting somewhere you get electrocuted and die.
There are 2 purposes of an earth ground: First it can be used as a reference for certain signals, such as microphones. Second, it can be used to protect against turning yourself into a sparker.
There is a clear separation between mains voltage and system voltages so it’s typically not going to be a problem, but if a little wire ends up contacting the power supply case it can become energized and things start to get really bad.
Most of the electrical code where I live focuses on grounding as “Bonding”, which is purely safety related for giving dangerous voltages a safe place to go.