This idea came from a fellow MVP, if I recall right. It’s a great hack to get a string of donor years onto your account so that you can search in listview or reports for donors from particular years or strings of years. It’s super easy to find people who have given two years in a row, 5 years in a row, or just know at a glance what’s going on with an account. You can filter in list view or reports with the string. It uses DLRS standard features. If you don’t have DLRS, you could implement similar with a scheduled Lightning Flow or with Mass Action Schedule and a flow. I think DLRS does a great job, though.