I'll be honest;
Prior to Young Justice the animated series, I never gave much thought to the term, let alone if Clark had ever been called as such in his younger years. Then YJAS came out, and though not the deepest of character arcs, I still liked Conner.
Come 2016, I'm finally getting into comics, and though Conner had been on again/off again in continuity, Jon was introduced as Superboy. I did learn that Clark was the first to get it, don't get me wrong. But, like Conner before (if for different reasons), I still enjoyed Jon's adventures. And sometimes misadventures.
So, take it how you will, long-time die-hards.