Feature Request: Select All Tracks Left or Right of Playhead

I already know what you meant.

You can turn on ripple mode and move the clip under the playhead to the right. It pushes all of the clips after it.

move them to a different track

You can select a range by using the shift key. It’s not much trouble. Say you have the clip under the playhead selected. Press home or end key. Shift-click the clip at the beginning or end.

You did not answer the question about whether to select on all tracks.