It’s been awhile since I’ve noticed this honestly, probably around the time they refactored the library & different views for your games but I realized that those annoying self-updating client packages that would restart steam seem to be a thing of the past. I was looking through my download history and the thought occurred to me that Steam hasnt forced a restart on me in so long.
For those who don’t know what I’m talking about, it would be a popup like this that would come up 5-10 minutes after steam was running. 
I still see it semi-frequently, but more because I don’t use my computer as much and it’s usually off. So after a week of non-use, Steam has often accumulated enough updates to necessitate a reboot.
It is still not nearly as frequent as new Nvidia drivers needing a reboot, though.