I managed to go back to the community garden today and check on the fig trees that I planted around May of 2016.
I initially gave these trees water almost on a weekly basis last summer, but stopped watering after the fall and have not watered since then.
All of them lost their original structure and died to the ground, but new growth looks robust. The one that looks to be the most in trouble (last photo) is probably an FMV infested petit Negri that I originally purchased from a nursery, but remains alive.
I'm seeing the same thing occur with my unmaintained trees at my wildlife property. Initial loss of the whole tree regardless of age then new growth from ground level.
The real question is, how long is it going to take those trees to adapt to their relatively new environment and start really growing? Based on my backyard experience, I'm guessing at least around five years.
In any case, I can confirm that fig trees in pot behave totally differently than in ground. As an example, I don't think that my trees in pot would've made it that long without any water to say the least.
greenshot