“the occurrence of unusually high spore abundance of ferns in the fossil record, usually immediately (in a geological sense) after an extinction event. The spikes are believed to represent a large, temporary increase in the number of ferns relative to other terrestrial plants after the extinction or thinning of the latter.”
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Also, ferns have some of the largest genomes that exist. And iirc, they are extremely polyploid. The suggestion as I recall from another age, is that if your goal is extreme redundancy of genetic data to prevent a loss of information, ferns have got you covered.
The ferns shall inherit the earth.
