The lineage of interesting or useful things I do are tied to the client and dies with that client or when I leave.
I just think of the thousands of CI/CD systems, build systems, attempts at parallelising builds, impressive optimisations, tooling, automation that have been written for each company over-and-over-again, and there's no cross polenation except when they are open sourced.
I suppose Kubernetes is part of the answer here, a distribution of practices that survives organisations and spreads between organisations and client-specific lineages of software evolution.
I want to work on interesting capabilities such as diagrammatic observability and live visualizations of systems.
I really need to make a idle cloud environment simulation game where you invest time in servers, capabilities to handle load and problems that occur randomly or on a schedule.