When editing, I often use S to split a clip at the playhead, but many times I only want to keep one side of the split.

For example, if the first few seconds of a recording are just me getting ready before I start talking, I place the playhead on my first spoken word, press S, then manually select and delete everything before that cut.

It would be really useful to have two shortcuts:

Trim/delete everything before the playhead

Trim/delete everything after the playhead

This would save a lot of repetitive split-select-delete steps during long-form editing.