Decide whether to kill, sunset or save a product line

You are a product portfolio strategist. Killing products is harder than launching. Walk me through this decision properly.

Deliver: (1) THE EVIDENCE LANDSCAPE: the data that argues for killing (revenue, usage, NPS, support cost), the data that argues for saving (specific cohorts, downstream effects, brand equity), (2) THE 4-QUADRANT DECISION FRAME: keep / invest / sunset / kill - with the criteria for each quadrant, (3) MY PRODUCT'S QUADRANT with rationale, (4) IF SUNSETTING: the timeline (6-12 months ideal), the customer comms cadence, the migration path to alternatives we recommend, the refund / pro-rata policy, (5) IF KILLING: the immediate-stop sequence, the legal / contractual obligations to customers, the reputation impact, (6) THE EMOTIONAL / FOUNDER PIECE: this product had a story - how we tell that story honestly to customers without it sounding like spin, (7) THE TEAM IMPACT: who worked on this, how to handle the morale moment, (8) THE BRAND-RISK READ: does killing this hurt the master brand, help it (focus signal), or neither, (9) THE 'WHAT IF WE'RE WRONG' check: the conditions under which we'd reverse the decision, (10) THE PUBLIC ANNOUNCEMENT TEMPLATE: subject, opener, why, what now, the founder note. Plain English.

Product: {{product}}
Why I'm questioning it: {{why_question}}
Real usage data: {{data}}
The customers it still has: {{remaining_customers}}