The Sunday Briefing.
One email, every Sunday: the shift out of legacy software, analyzed by a team that spent 16 years inside it — and weighted toward what you actually read.
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What you get
- The Sunday issue.
- The week's most important development in the shift out of legacy software — the numbers behind it, sourced, and what to do about them. Short enough to read before your first meeting.
- Built around your reading.
- The Briefing is designed to learn what you follow — the pillars you read, the tools you run, the series you're partway through — and weight each issue accordingly. Tell it nothing; it pays attention.
- Your tool results, kept.
- Run the Lock-In Scorer — or any Library tool — and your numbers arrive at this same address. One inbox, no separate signups.
A Sample Issue
Built from analysis already published in the Library, weighted the way a subscriber's reading would weight it — this is the shape of what lands on Sunday.
THE SUNDAY BRIEFING · SPECIMEN
The AI spend audit has already started
Three things worth your time this week — weighted to what you've been reading.
FOLLOWING: AI SPEND
1. Finance can see the AI bill now.
Engineering teams adopted AI tools outside procurement, and the informal audit has already begun. Uber set a $1,500/month per-developer cap in June; BetterCloud’s 2025 median sits at $85–$140. The gap between those two numbers is where the audit conversation starts. Our framework: keep tools above 60% monthly active use, cut below 30%, and give the middle tier 90 days to prove ROI.
Read the framework →READ: THE WORDPRESS RECKONING · PART 3
2. WordPress's security debt now has a deadline.
11,334 new ecosystem vulnerabilities in 2025 — up 42% year-over-year, with 46% unpatched at disclosure (Patchstack). The EU Cyber Resilience Act’s Article 14 obligations arrive September 11, 2026: 24-hour exploit reporting, penalties up to €15M. A 30-plugin stack means 30 compliance surfaces. Modern architectures have one.
Read the analysis →RAN: THE LOCK-IN SCORER
3. Your TCO model stops at the invoice. The costs don't.
Real platform cost runs 2–3x the invoice once partner retainers and admin labor are counted. And the asymmetry matters more than the totals: switching costs are one-time, dependency costs compound at 8–12% a year. On a five-year horizon, staying on a high-cost platform is almost always the more expensive choice.
Read the Full-Stack Cost Index →That's the Briefing. Forward it to whoever owns the renewal.
— Lynton
The next issue lands Sunday.