In the beta, as of some recent point, there was a system where worlds started with either saplings or twiggy trees, either regular or juicy bushes, and I think either grass tufts or grass gekkos, although I never had one come up with the gekkos dominant initially. If you're on the beta, you know the deal -- over time, the dominant resource type would gradually die off and be replaced by the alternate one, and then back the other way. I liked that a lot! It made the seasonal cycle feel a full step more real, integrated into the behavior of the world, and once I figured out what was going on, it caused me to change up my harvesting strategy in what's probably an overall improvement. (I went from transplanting grass, saplings, and berry bushes to making a habit of gathering them as I ran around doing other things. It eliminated the grindy process of bringing those plants back to my base, made travel over distances a little more interesting, and made me feel a little more like I was living in the wilderness vs. taming it. 10/10, will keep doing.) Last night, I explained this whole system to a friend, and about twenty minutes later, discovered that it had been discontinued. Why? Is it likely to come back? I was, clearly, a big fan, and I can't have been the only one.
I did generate one world where I seemed only to have twiggy trees and juicy berry bushes that never got replaced by their original counterparts, and it looks like that was reported here, so I'm hoping it's just an implementation thing that will be worked out.