Jarred/canned tomatoes might be the worst example. You barely need to try to make the preservation mechanism work. The pH of tomatoes tends to be very low and i

Jarred/canned tomatoes might be the worst example. You barely need to try to make the preservation mechanism work. The pH of tomatoes tends to be very low and it's very easy to pull it down with lime juice, etc. The highest quality marinara almost universally starts with something like an ordinary can of San Marzano tomatoes. This isn't some exotic find at Whole Foods. This will be collecting dust on the shelves at Kroger and Brookshires. Buying fresh produce 100% of the time is theatrics. There are a lot of things it's a good idea for, but you are genuinely wasting your time in other areas.