Gardening is fun, and even more so when you eat the fruit of your labor. Here in the SW, very few plants can survive the summer heat, except okra and eggplants, and we grow mostly in the shoulder season of spring and fall.
And up in our high-elevation home, the danger of frost does not go away until Memorial Day, and returns in early October so the growing season is so short and we have not bothered.
I often envy my friends and relatives who live in CA with a moderate climate where they can grow nearly year round. Up in the Puget Sound, I guess it is not too bad as the winter is not too brutal, and the growing season is still longer than what I have.
We finally gave up the ghost on a 2 year old tomato plant... it produced up till 3 weeks ago - but was dying so we pulled it out to replace it with the new plant. (It was the only one that lasted this long.) We have a lot of "annual" plants that act like perennials here.