Cal.com
Changelog7-point breakdown
'New Design System & UI Overhaul' names the internal project rather than the outcome users get from it.
The opening sentence details the migration to 'coss.com/ui' and 'Base UI' before ever stating what changes for the user.
The 'New features' section is a long run of 'We've added/introduced/built' statements (e.g. domain allowlist, dot-notation Salesforce fields) with minimal explanation of the resulting benefit.
Dense paragraphs like the full coss ui migration list and the feature dump run together with no bullets, spacing, or scannable structure in the provided text.
Concrete specifics appear occasionally (live booker preview, 1M users, 20M bookings) but most items like 'improved a lot of previously confusing pieces' stay vague.
The 1M verified users and 20M bookings milestone is dropped mid-anecdote under 'Company Retreat in Japan' instead of being foregrounded.
The piece closes on 'See you next month' with no directive action tied to any of the shipped features.
The changelog leads with implementation details ('We've migrated the entire Cal.com application to our new coss.com/ui design system') rather than user outcomes, and stacks dozens of 'We've added X' feature bullets with little translation into benefit. The single strongest proof point—'1M verified users and 20M total bookings'—is buried inside a casual anecdote about a company retreat rather than surfaced as a headline stat, and the piece closes with 'See you next month' instead of any actionable next step.
New Design System & UI Overhaul We've migrated the entire Cal.com application to our new coss.com/ui design system, a modern, accessible component library built on top of Base UI. This release represents one of the largest visual and architectural upgrades in Cal.com's history, touching nearly every core surface of the product. Besides migrating almost every single component to coss.com/ui we’ve also looked at the user experience of most pages and improved a lot of previously confusing pieces. A long-requested feature for drag and drop was also added during this migration, for event-types, workflows and routing forms. Event Type Redesign The event type settings page has been completely redesigned with a live booker preview, giving you a real-time look at how your booking page appears as you configure it. Every setting has been reordered and recategorized for clarity, and we've removed "Advanced settings" entirely as it had become a dumping ground due to a lack of better categories. Att← Back to the Decision Friction Index