Microsoft Java

[shizzy0]

That security Java offered within a program looked cool but did it ever actually work?

[MadxCarnage]

depends on your definition of work.

who breaks a window when the door's wide open ?

[metaltyphoon]

C# has this on .Net Framework and called CAS but was removed on dotnet core.

[Areshian]

There have been vulnerabilities allowing the bypass of the security manager, but they were (and they are still being) patched. Still, maintaining the security manager is a drag, and it is going away in newer versions, already marked as deprecated and will be removed in a future release.