Long ago and far away, I had a book that showed oil flow in various automatic transmissions in various gears. I was surprised to see that some transmissions had little or no oil flow in Neutral. None to the cooler, none to the bearings, most of it just dumped back into the pan.
Based on that, I would strongly recommend that anybody who wants to do this find out about oil flow in Neutral!
If the output shaft bearing does not get lubricated, it will eventually fail! It will likely take a while, but it will happen.
edited to change "old" to "oil".