So this post-Floyd tune could be Styx--or it could be one of those Canadian semi-prog bands that came after Rush like Triumph. Betting it's the latter.
ETA: Per the Top 40 Hits site, there were two songs called Hold On that charted in '79--Ian Gomm's (TANC pt. II) and this one. And yeah, it's Triumph.
Which brings up the question: will we get the Hold On twin-spin?
Nah.