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Adobe Flash is officially no longer available for Android devices. This raises a tough question for Web developers: whether to support Flash at all, and how to migrate a Flash investment for the next-generation of Web users.

Web developers have responded by moving away from Flash. Since last year, Flash usage on Web sites has declined from 27% to 23%, according to W3Techs. In comparison: Microsoft's Silverlight barely moves the needle with deployment of 0.3%, just above Java's 0.2%. JavaScript is used by over 92% of sites. HTML5 is reportedly in active use on 34% of the top 100 Web sites.

Adobe is hoping developers and users will adopt the Adobe AIR (“Adobe Integrated Runtime”) format, which extends many of the core Flash technologies in a cross-platform framework for deploying Web applications. AIR is available for Android, iOS, BlackBerry, Windows, OSX, and Linux.

The company will instead focus on HTML5 development, which enables web browsers including those on mobile phones to perform essentially the same task as flash but without relying Adobe's proprietary technologies.

Not accounting for device width

Making users fill out long forms

Not reconsidering content