The AC in my 07 was still working fine when we traded it in a few years ago. I did have to clean out the condenser fins a couple of times.
I had a 93 Award TT and the AC was working fine when we bought it. Right before our first trip I went to turn the AC on and it was warm. Thankfully my neighbor does commercial HVAC. He found a line that cracked from vibration. He repaired the crack. Installed a charge fitting, vacuumed and charged it and it worked fine for the 2 years we had it until we traded it in.
And because of that little find, I always test things 3-5 days before we leave.