Comment by ahmedfromtunis

The vim version is much easier, if you ask me: 3 strokes, 2 keys and 0 combinations.

The one you suggest however requires 4 strokes (ctrl then o then shift then s), 4 keys (ctrl, o, shift, s) and 2 combinations.

The "cc" sequence deletes the line and switches automatically to insert mode. To forgo the switch, the sequence then becomes "dd".