Re: Pretty much every game, OS, or application torrent has some form of malware.
I have never had an issue with steam. According to steam gauge:
"Over the last 11 years, you've spent 2093.5 hours playing this selection, which includes 124 items, is valued at $1622.9, and requires 546.7 GB"
So no issue whatsoever with 124 games; caveat - no issue installing, buying, running. The games themselves might be flawed (such as sword of the stars 2 etc) but apart from that I would say steam was a catalyst to reform.
I have an offline cache on 2 laptops primarily with my turn based games. I have an online cache on 2 other PCs and have no problems playing on those PCs with my library. I suppose I could install the "family share" thing but don't need to.