Some bakeries have kept the same sourdough starter alive for decades. Build something worth handing on.

Some things are kept alive rather than finished. A starter exists because somebody fed it on an ordinary morning, and then somebody else did, for years, with no one able to claim they made it. That is a different kind of making from building something and signing it. It asks for maintenance and a successor instead of a finale.

Look at whatever you are part of that will outlast your time in it: a team, a club, a family recipe. Do one thing to make it easier for whoever comes next. Write down how it works, because that is usually the part that gets lost.