A few things come to mind
1. backups and DR
2. automation (IaC, scripted deployment, templates etc).
3. more bitcoin/nostr related deployments
4. nested virtualization for some more "lab stye" stuff which won't impact the production systems.
5. expansion of my media streaming to include automated show downloads based on a netflix-like algo.

I've got a ton of ideas, i just need to find the time :)