As someone still using the iPhone SE, I find this article a bit corny.
I've been in to the Apple store and played with the new phones several times. Speed is a complete non-issue with the SE. It's not like the 4s was at the same age. It's a bit faster than a 6s because it has less pixels to push.
The video quality is great (and I often use it for interviews, intros, BRoll, etc). If you never saw
Apple of My Eye (shot only with and
iPhone 4), it's a great reminder of what good lighting and cinematography can do even when you don't have the latest and greatest. It's also a great short example of how important the story is.
My ONLY issue with the SE is the screen size. I would like to do more with FILMIC (which works great), but the screen is a bit small. I love still having a headphone jack and one-hand operation (something I think people often overlook). If screen size isn't an issue, I don't think you'll be disappointed. Oh, one other HUGE positive...NO NOTCH!