I honestly really miss this feature. My project has almost 100 examples / tests, so navigating / managing / regenerating a launch.json is cumbersome. It was really nice to be able to navigate to a file and press "debug". It is also worth pointing out that the Rust Analyzer: Run command also doesn't work for examples either, where it used to work perfectly in older builds.
I was able to bisect the build that resulted in the regression:
v0.2.159 (works)

v0.2.166 (does not work)
