What's been the most groundbreaking and life-changing is the BATTERY LIFE.
No longer do I have to worry about losing 10% of my battery before even getting into the office in the morning. I can listen to my podcasts or read through a story and still have 99% left after my commute.
At the end of the work day on my old phone, I'd often be left with battery life in the single digits. Now, I can go a whole day without dipping below 60%.
All this to say, I'm glad I made the leap when I did.
The iPhone XR was the first device in almost four years I actually got excited about switching to. Though, had the health of my 5S not deteriorated so quickly, I could still see myself benefitting from the size.
If I could put all of the updates I got from the XR into the size of the 5S, that might be the perfect phone for me — though with the discontinuation of the smaller iPhone SE, I'm not expecting that to happen any time soon.