This site has become inundated with 'How much do you think set X will make for me?' or 'I do my own research, but just for fun, what set is likely to be a good investment?' questions from low post members.
I'm new to this site myself, but if someone spends a little time to browse the forums, it's glaringly obvious that no-one really can predict how any set is going to perform post-EOL - especially with the glut of new investors - any more than when a set will retire.
TLG semingly taking delight in thwarting resellers with unpredictable long runs for some sets or re-releasing other retired sets to stymie the prices for the retired sets.
This post isn't an attack on you, just I see this question all the time here. And yes, I know it's fun to speculate, dream of Sandcrawlers becoming the next 10179, and no harm in asking as that's what a forum is for, but I see a growing resentment by many older members here in reaction to seemingly lazy help-me-make-money-without-researching-the-info-already-speculated-upon-many-times constant questions.
To answer your question with my own guess, I would say maybe the SC could retire later this year as Smyths aren't stocking it anymore, and they still still stock EV. This is if it follows the usual availability cycle of 2 years since it was re-released in 2014. Who knows? It could become the next Death Star and keep going for another 6 years.
The only way anyone knows if it's going to retire is when LEGO Shop at Home stick the 'retiring soon' label on it.