Nice article Aen. Like you I love glosso.
To OP, yes, eventually it will grow on top of itself - layer upon layer. This layering should not be confused with vertical growth which is due to low light.
When this happens I give it a good "weed wacking" practically down to the substrate. It comes back pretty fast.
Here, on the left you can see the roots of the glosso just hanging above the substrate - time for a trim. What happens is the lower layers end up dying. The right side represents an area that recently got trimmed.
