Microsoft Silverlight (64-bit) was developed by Microsoft in the late 2000s with the goal of revolutionizing online experiences. This web plugin aimed to offer features that went beyond traditional HTML and Flash, such as rich multimedia capabilities, interactive applications, and cross-platform compatibility.

Some of Silverlight's strengths include enhanced multimedia capabilities, such as smoother video playback, higher-quality audio, and more advanced animation capabilities compared to Flash. It also offers a familiar development environment for developers already familiar with the Microsoft ecosystem, using .NET languages and tools. Additionally, Silverlight supports multiple platforms, including Windows, Mac, and mobile platforms like Windows Phone and Nokia S60.

However, Silverlight has its weaknesses. Despite Microsoft's efforts, it never achieved widespread adoption outside of Windows. Browser vendors like Chrome and Firefox refuse to support it, citing security concerns and competition with their own web technologies. Additionally, Silverlight requires users to install a plugin, creating an extra barrier to entry compared to native web technologies. Silverlight also has security vulnerabilities, further eroding trust and hindering adoption.

In conclusion, Microsoft Silverlight (64-bit) is a well-intentioned attempt to push the boundaries of web experiences. However, its limited platform support, plugin dependency, and security issues ultimately doomed its success. While it offers some advantages, especially for multimedia applications, the rise of HTML5 and other open web standards renders Silverlight obsolete.

Silverlight's inability to achieve widespread adoption outside of Windows is a major factor in its limited success. Browser vendors' refusal to support it due to security concerns and competition with their own web technologies further hindered its adoption. Additionally, the requirement for users to install a plugin creates an extra barrier to entry, making it less appealing to users who are already familiar with native web technologies.

Furthermore, Silverlight's security vulnerabilities have also contributed to its decline. Security is a major concern for web developers and users, and Silverlight's vulnerabilities have made it a less appealing option. This has led to a decline in usage and a shift towards more secure and open web standards like HTML5.

Despite its decline, Silverlight still has its advantages, especially for multimedia applications. Its ability to handle high-quality video, audio, and animation made it a popular choice for developers creating multimedia content. However, the rise of HTML5 and other open web standards has made it less necessary for developers to rely on proprietary technologies like Silverlight.

In summary, Microsoft Silverlight (64-bit) was a well-intentioned attempt to revolutionize online experiences, but its limited platform support, plugin dependency, and security issues ultimately doomed its success. While it offers some advantages, especially for multimedia applications, the rise of HTML5