Where I work we have teams and guilds. Guilds operate every other Friday, they work on cross-team concepts (e.g. automation, ai/ml, security, open source). Some

Where I work we have teams and guilds. Guilds operate every other Friday, they work on cross-team concepts (e.g. automation, ai/ml, security, open source). Some guilds work better than others. The downside is around ownership (e.g. A guild creates a useful tool that ends up being used throughout the org, who fixes the critical bugs that arise?) We originally cargo-culted the Spotify model, but changed it to fit how we want to work, it seems OK.