I mostly use DigitalOcean and their managed kubernetes service. My projects tend to be self-contained in a monorepo (where my k8s manifest also live) and I use Flux* to keep my cluster in sync. I'm quite happy with, took a bit of time to get it set up exactly how I wanted, but now it's no-effort to do releases.
I've been working on a platform to help teams deal with their deadletter queues. It's very much a scratch my own itch project as it's solving a problem that I've faced while at my day job.
I've been working on an event orchestration platform[1] with the initial use case being "surface your deadletter queue, and resolve problems" mostly to scratch an itch. In other words, what happens when you can't process an event and you want a human to investigate the why and perform some kind of action to resolve the issue.