Thank you for the feedback.
The SDK Browser is currently under modifications as we are aware that it hasn't been changed long time ago. The road-map broken url is already fixed and will be applied with the 6.2 release. As for the future plans of the samples - please note that for each new Sitefinity version we are upgrading the old samples and update their content if needed to support the latest changes. We are having some ideas for displaying the newest Sitefinity features in new samples. Stay tuned.