Select from cursor to end can be useful on a hotkey. So you would set up “Split at cursor” on a hotkey of choice, put your cursor where you want and “Split at cursor” and then hit your “Select from cursor to end” key all parts in the arrangement are selected from your cursor onwards. Very useful when making radio programmes as an example as you were always opening and closing gaps and needing to select all audio after cursor and then slide it forwards or back in time. Similar thing different approach.
Then you could at least move the entire arrangement from that point onwards to open a gap up in the arrangement.