Most of the things I wished existed, only to end up writing myself, tend to be things like:
* Dashboards. I don’t mean bar charts or business analytics insanity. I just mean a flat list of things and whether they are green or red in real time.
* Media access. Jellyfin and Plex are great and really solve for 90% of that space, but for that last 10% I have personal solutions.
* Container management. Kubernetes is too complicated. I can really solve for that more directly with a good dashboard and proper scripted access on top of that dashboard.
* Managed streams. Services work better when they are bit streams instead of over-engineered HTTP insanity. So for that I wrote my own WebSocket solution that I can independently scale and extend in different ways that may sometimes violate RFC6455.