Earlier quoted context omitted.
And yet, Apple has been pushing me in a direction I don't want to go with their recent OS X versions. I paid a lot of money for my mackbook and was quite happy with Lion, but was recently forced to upgrade because apparently Lion is way too out of date. So now I'm on Sierra, and I absolutely hate it. I thought it'd mostly just be uglier, but it bugs me with updates I don't want or need but am not allowed to ignore. A…
Which notifications are you talking about? I have no such experience using Sierra.
I've found a way to get rid of the update notifications, though: click "details", which opens the app store with a list of your pending updates. As long as you leave that open, the notification won't reappear.
Still annoying, though.