I'm not sure that's a safe bet. iOS updates have become notorious for things breaking, sometimes in very obvious ways. I have an iPhone and a recent update caused some very obvious degradation of battery lifetime between charges, for example. Given that I have an unmodified phone running almost nothing but the standard Apple software, and the tiny number of apps I do have installed haven't been used since before that update, there isn't much excuse for this.
Meanwhile, I currently have email disabled on my phone pending a fix for a known security vulnerability that is reportedly going to be included in a firmware update delivered several weeks after the vulnerability was out in the wild and doing the rounds on tech sites.
Neither of these is reassuring when it comes to the current state of iOS robustness and security, and five minutes with Google will show that my experience is not unusual among iPhone users in recent times.
The really sad thing is that iOS devices still seem to be relatively robust compared to either Windows 10 or macOS on the desktop. It feels like Apple and Microsoft have both decided they are so dominant now that quality control doesn't need to be a business priority, and as a result we've left behind the "golden age" up to the mid-2010s when your OS mostly Just Worked(TM) and entered a new age where the most basic reliability of our essential IT systems is in question.
Oh it did. Earlier OS X releases were way more stable and didn't break shit for no reason.
Quality assurance has gone downhill over the last years, that's what happens when the people in control are no longer engineers taking pride in high quality bug free code but rather managers whose incentives are to push as many new features out as possible - which IMO was also the reason why 86 support was dropped in Catalina, it was too expensive to keep supporting, but heh who cares about users of stuff like VSTs for sound people or people wanting to use their Mac for gaming...