I'll correct myself about the Conti's. I zoned out on the 4th iterations. Still very heavy, and even less popular.
I stand by the rest.
I have owned and still own several Schwinn's, both actual and import. My 77' Chrome Super Le Tour is a fine bike. Still not an actual Schwinn.
I guess I'm a bit more jaded on this subject since I've seen and owned so many since my first bike was 59 speedster and 2nd a Racer and many since then. I've been too old for heavy bikes now for quite awhile so I just look and flip them now.(current project a 41 autocycle).
No reason to have fit though, just a bike.
The OPs bike is still a good ride, no foul, just not what the Sprint started out as and merely a name on a different companies bike.