I appreciate the Hell out of Joseph Lofthouse and his landraces of beans, squash, etc. But for this gardener the effort to breed promiscuity into the auto-erotic common heirloom tomato is misguided. Here's why:
I have searched far and wide for heirloom tomatoes that will grow and produce in my local conditions. I have found a few that I like and will do well. I want to plant the three varieties- slicing, paste, and cherry- in adjacent rows, and save their seeds for next year, and get the same tomatoes. A promiscuous phenotype will force me to use several plots widely separated in order to do that. And we know that solanums have to be rotated to limit blight building up from year to year. So where shall I plant the next year's crop? - my gardens are not infinite.
If I can't find tomatoes that will produce satisfactory results then a landrace approach might make sense. But it's a lot of extra effort, and life is short. Let's concentrate on, for instance, a cool weather watermelon. I'd really go for that.