Airstrips/Airplaneports?

I’m sure I found an airstrip a few months back in an experimental build, but it was the only one i’ve seen so far and was wondering if they’re still in the game?
My brain could have totally snapped and this never happened, but i’m hoping i’ve still got most (some) of my sanity

Well, they are in game files at least. I haven’t found one in a while but I did find couple in november or december 2019.

I saw one a couple weeks ago, in an experimental build.