Most climbing gyms put auto belays only on flat or slabby ‘beginniner’ areas of the walls because most people using auto belays can’t do much on harder stuff -

Most climbing gyms put auto belays only on flat or slabby ‘beginniner’ areas of the walls because most people using auto belays can’t do much on harder stuff - and also it’s kind of convenient to have your partner ‘take’/hold you on steep stuff sometimes. Having uncontrolled (but slow) descents onto people’s heads probably also doesn’t help.