You also know a lot more, so finding challenging problems is harder. When first starting everything is new and challenging. Eventually you start to see the same

You also know a lot more, so finding challenging problems is harder. When first starting everything is new and challenging. Eventually you start to see the same patterns over and over. What’s kept me interested over many years is to expand my problem space. Business problems, people problems, devops problems, architecture problems, etc... There are tons of problems to solve, just not all them require code (unfortunately).