you have enough layers. This could effect your thresholds, your doors, your additional height should be causing problems.
But, If the existing floor is in good shape and down suffeciently, you could do it again if you thought you need to do this. If you begin to take off the last layer, you might be tearing into the second layer and so on. At some point you will have to remove the floor down to the last one or non at all.
I would not do it, but that is my thinking. fly your flag.