It's true that fig friends can be another source of back up. Once you build relationships, the links are your safety net. However, I don't think there's anything that can turn back the time invested. Imagine the favored fig trees that have reached maturity at year 5. Their fig flavor have reached the apex and stabilized. A freak freeze/ heat wave/ flood, etc...came through before any protection can be erected. Even if the trees recover from the ground, the five years of effort and growth have been wiped out. New trees can be rooted and planted, but I imagine I would feel a deep loss, like 5 years of my life had just froze to death.
That's why I think it wise to plant two of each variety in ground at different locations; one in the main orchard and another in a hedge as a hedge against disaster. The third string in the bow would be a container plant. The fourth and fifth are frankenfig and fig friends. In such a way the risk of lost time is spread out and mitigated. Of course practicalities and other limitations have to be considered too, like if there is no land, space, and other resources. By such point, the issue becomes about force-constrained decisions.
Given an unconstrained choice I would back up the trees in such a way that time invested in favored cultivars is preserved because the costliest, most irreplaceable resource, and most precious is not the monetary cost of attaining the variety, but the cost of time invested in attaining and growing it.
Sorry for the long reply post. Recently, I've thought a lot about what if plan ABC all failed, then what is it I want saved above all.