Ikea are selling Yucca as houseplants just now; well the Glasgow store was a fortnight ago.
Think about relevant climate when you consider some foods, and for sea or shore foraging, there are a heck of a lot of days, especially in Winter, when that is just a total no-go.
Things that could be done in the past, just can't now. River fish traps for instance, but then they used to say that folks could walk dry shod over a river across the backs of salmon because they were so plentiful.
Try that on the Thames now......
It's interesting to suss out what we can find and eat though