If you want to reuse a soft effect, you can copy it to other timeline segments, to the Source Area, to other clips that use the same media, or to the BFX schematic.
If you copy a soft effect to the BFX schematic, it is automatically converted to a node. See Copying Soft Effects to a BFX Setup.
To replace a source to the timeline without removing soft effects from the replaced shot, see Source-Only Replace Edits.