I've checked into this with the Target Engineering team and I have confirmed that no we do not use SSE. If you have a good use case for that lets either you or I can open a feature request for it with a detailed description of how you would use it. Let me know if you would like me to do that on your behalf or if you would like to do that yourself from here: Target - Ideas on that page click on "Submit an Idea".
If this satisfies your query please like, mark as helpful and mark as answer. Otherwise lets keep the conversation going. Hope you have a wonderful day.