Commenting out is there, you can search the keyboard shortcut settings to find the proper key. Actually, there are multiple commands on that subject:
- editor.action.commentLine toggles comments
- editor.action.addCommentLine & editor.action.removeCommentLine
- editor.action.blockComment for block comments
Everyone has their pet feature, most of them stuff that I never use or didn't even know they existed.
I personally like ctrl+/ to comment out blocks or mark stuff from the integrated terminal, both didn't work the last time I tried it.