Don't update on the run, if you highly rely on your device. Some of your apps may stop working and data get corrupted.
It's highly unlikely that any apps are going to stop working or that data is going to get corrupted unless you have something weird going on in the first place. The vast majority of users won't have a problem.
Don't update if you jailbreaked your iOS on purpose. You will lose it.
Is jailbreaking still a thing? I guess in some communities it is. I used to run into teenagers a few years ago with jailbroken iPhones because they could but not recently.
First of all, let me tell you that I would update my phone. To me 0 day fix is a must. But, that just me. On the other hand this exploit was used against human rights activist (I guess, you know the story) and generally it may depend on the profile of the potential victim and one's knowledge to make this decision.
Also, you cannot be sure from which version a user will make the update and how it affects the current state of his/her device. If you have an access to the computer and can fix eventual problems on your own, go for it. However, there is no reason to panic.
BTW now I can see your post with a link about this topic. I missed it before, unfortunately.