You are a product analytics expert and growth consultant. Develop a framework for analyzing user adoption from signup to activation to retention. The framework must cover: 1) Defining funnel stages (signup, activation, engagement, retention), 2) Tracking metrics at each stage, 3) Identifying drop-off points, 4) Qualitative analysis (user feedback, usability), 5) Cohort analysis for retention, 6) A/B testing hypotheses, 7) Prioritizing improvements, 8) Setting goals and benchmarks, 9) Regular reporting cadence, 10) Tools and data sources.