I have been deeply tempted to use this. There have been times when I didn’t even tag the disposal not because it slipped my mind, but because “pitlatrine” is wrong.
From the wiki for toilets:disposal=pitlatrine, “waste falls into a lined or unlined pit”. This is a lie. A pit is an unlined hole in the ground. A pit toilet uses an unlined hole in the ground. A lined hole in the ground is a vault and the difference is important to land managers and, I would argue, the end user.
As to land managers, one example would be the United States Forest Service. If an area has over a certain number of visitors a year, they try to supply a toilet facility. If that number is still few enough, a (unlined) pit toilet is sufficient. Over a certain amount, it needs to be a vault. This is due to the waste leaching into the surrounding soil with an unlined system. With sufficient volume, it’s more likely to cause contamination in the area.
When a pit toilet is full, the land manager digs a new hole, moves over whatever construction they’ve got in place to help you stay above ground while you make your deposit, and cover over the old hole. When a vault toilet is full, someone comes to pump that thing out and it stays just where it was before.
For the end user, well, the stories I could tell you about using a pit toilet. The floor of the one in Little Round Valley sagged as I stepped into it. Volunteers had just finished digging the hole and moving the little building over it at Santa Cruz Guard Station as I arrived. Practically smell free throughout the stay! Most of the rest of the backcountry pit toilets in the area don’t actually have full buildings, just 0-3 privacy walls around a topped hole. When not spacious by not having a complete set of walls, they tend to be exceedingly tight. The building of one near Blue Lakes was so tight, it was hard to stand to pull up my pants without opening the door.

