As long as you do some pretty minimal upkeep, you can bake bread basically forever using a starter, salt, flour, and water.
Sourdough is cool because it's the way basically everyone made bread before commercial yeast became widely available, and those folks did not, as a rule, have access to Google Spreadsheets. You'll be OK. During the pandemic, a lot of people didn't have access to bread, and yeast was scarce in supermarkets. A sourdough starter — aka a natural leavener — solves those problems. As long as you do some pretty minimal upkeep, you can bake bread basically forever using a starter, salt, flour, and water.