Because we have the space, and I love growing veg, I used to grow masses of my favourite types, then just give the excess away, or even dump it on the compost heap. What a waste of produce and energy. Now I don't have any energy and really resent people who accept veg from me when I know they'll just dump them and not use them. So I've cut it back to the bare minimum - which is why we ran out of spuds - I need to reassess how many is enough. I no longer give away or sell my produce. As you say, it's a balance, with diseases, predation, bad weather and so on. Most years I have at least one crop that fails, but that's just gardening

I would like to try perennial veg varieties, but the couch grass and thistles here overwhelm me every year, so I daren't try even asparagus, as it would be such a disappointment when the bed disappeared under invasive weeds. My strawberry beds are usually infested, although we do get a crop. Raspberries are a jungle, but again we crop plenty. My bramble patch will have to be hacked right back to the ground as it's a huge, impenetrable spikey trap. I've wondered about '9 star perennial kale' - has anyone tried that?
Going back to the lazy beds, what you end up with
is a raised bed, which gets higher each year with the addition of manure and compost. It doesn't have to have any kind of edging at all, just mow the paths between.