The fact that Burning Man tickets are no longer selling out makes it more appealing to start going again. It got to be too much of a nuisance trying to scramble for access. Imagine trying to rally a crew together for a project when you have no idea who will actually get a ticket until you should already be months into the work!
Not to mention that the extra 20,000 tourists who were just there to gawk didn't help the vibe and did add to lines, etc.