It may be worth adding a per-version EOL cell, and potential caveats. Windows operating systems, for example, can receive paid support if you happen to have a billion dollars laying around.
Edit: By per-version EOL cell, I mean to allow URL references on a per-version basis for websites that don't list them all on one page, or at all. While there a date-released may also be super useful in some situations when you're trying to figure out how long since it's been patched.