As someone who has used WordPress since 2011, I would like to see a repository of blocks built that could be added individually sort of like we do with plugins. This way we don't add any unnecessary bloat to the site. Instead of adding a bunch of blocks I don't need and will never use, I would just add the ones I need. I'm not sure if this is possible because I'm not a developer, but if everyone contributed to one modular system that would be amazing.