Were you going from junior (L3) to intermediate (L4)? If you were, then the task you described seems appropriate - you don't have to do much to go from L3 to L4

Were you going from junior (L3) to intermediate (L4)? If you were, then the task you described seems appropriate - you don't have to do much to go from L3 to L4. The author of the blog post was going for senior (L5), which you can't get just by maintaining code.