Microsoft is no longer working on Project Catnip, a Progressive Web App (PWA) for Windows Insiders, the company noted in its release notes for today's preview build.

Microsoft is seeing a near "57% improvement in page interactivity" with PWAs vs. Web apps. Microsoft credited "Project Nucleus" as enabling the transition of Microsoft Lists into a PWA.

Since then, the company's PWA momentum -- at least publicly -- seemed to have waned. However, this week, a couple of different teams at Microsoft have started talking about their PWA plans.