I like using the lynx levelers because they are light weight, and easy to store in their own little bag. Also, I don't have to worry about them taking on water or insects; when you take them up, you can just clap them together to remove all the "stuff" that accumulates.
I can't say they don't "rot" like wood, because the plastic is UV sensitive and will degrade over time; so it's just a different kind of rot. They will eventually need to be replaced.
All that being said, I keep a decent stock of scrap lumber on board as well; you just never know what you're going to need!
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!