SSBO vs VBO performance

Question

The standard approach to rendering is to first define VBO and then use layout in

layout (location = 0) in vec4 point;

void main(){
    gl_Position = point;
}

However, the exact same result could be achieved with SSBO

layout(std430, binding = 0) buffer Points{
    vec4 points[];
};
void main(){
    gl_Position = points[gl_VertexID];
}

I am wondering whether there is any performance difference between those two approaches.

Couldn't we just use SSBO all the time and completely get rid of VBO?

Of course the older hardware might not support SSBO, but if I don't care about such compatibility, then what's really stopping me?