K3s is a lightweight Kubernetes distribution built for IoT and edge computing. It's packaged as a single binary and has minimal to no OS dependencies, making it really easy to operate and use. It uses sqlite3 as the default storage backend instead of etcd. It has a reduced memory footprint because it runs all relevant components in a single process. It also achieves a smaller binary by stripping out third-party storage drivers and cloud providers that are not relevant for the K3s use cases. For environments with constrained resources, K3s is a pretty good choice and worth considering.