Quick gut check. Just posted on LinkedIn about the 4 tiers of AI stack. Curious what the breakdown looks like in here. 1. Web-only (browser tabs)? 2. Mixed (web plus some custom GPTs or API)? 3. Custom apps (Projects, NotebookLM, n8n)? 4. CLI / harness (Claude Code or similar)? No judgment on the answer. The thing I'm actually trying to learn: if you're not at the tier you want to be at, what's the actual blocker? Confidence, time, money, "not sure where to start," or something else? Be honest. I want to know what to help with first.