Comment by MostlyStable

I meant dead end in the sense that their genes aren't going anywhere. 90+% of home gardeners don't save seeds, and the few that do are almost certainly not preserving the strains they think they are since, most gardeners grow multiple varieties at the same time that are all getting cross pollinated. It was not meant to imply anything about the viability of the strain they are growing, many of which are fantastic heirlooms that have been around for generations.