FlakeHub not only indexes flakes, but provides a mechanism for fetching compatible versions based on Semantic versioning — and, unlike pinning tags in your flake.nix inputs, keeping them up to date.
This means that you can specify that you want your input to be compatible with whatever is the latest release at the time that you add it, and get bugfixes with every nix flake update, without manually having to keep track of the releases made upstream, nor follow a development branch which may introduce breaking changes at any time.