Feet stick to ground - uncheck if you want your feet (and the rest of your avatar) to be unable to leave the ground, like in ol' good times Enable IKTweaks (use custom spine solver) - uncheck to go back to default VRC FBT IK. ...
This prevents it from getting your SteamID, which means that it won't get sent to everyone in the instance. No more assholes taking a peek at your Steam profile! This will also make you unable to log in via Steam.Additionally, you may experience different voice quality. Nothing too bad ...