Personally I don't think it matters if Copilot spits out large near-complete functions or smaller one-line snippets, or if you find it useful or not. The fact

Personally I don't think it matters if Copilot spits out large near-complete functions or smaller one-line snippets, or if you find it useful or not. The fact is that it consumes a large corpus of work and launders it in way that removes all attribution should be a big no. That goes against the entire spirit of copyright law. It must be opt-in, or make Microsoft wait 95 years to incorporate code in public repos for their for-profit enterprise.