[josephg]

I think that’s increasingly not the case. I’m writing this message on an iPhone 6s which honestly still feels great. I had the battery replaced a couple years ago but aside from that I haven’t had any problems with it - all the apps I run on it feel smooth and responsive. (And in some cases better than my desktop since they aren’t running through electron.)

If not for the camera and iOS support inevitably ending, I don’t see much reason to upgrade.

[nicoburns]

I think the iPhone 6S is actually the oldest phone to which this applies. It was a big step up in processor speed from the 6, and I think it marked the point at which phone cpus hit "fast enough". Hopefully apple continue to support the 6S for at least a couple more years, because I don't think there's any technical reason why they can't.

[photojosh]

Notably it has also 2GB of RAM, when the older devices have 1.

One of the kids' phones is an SE which is pretty much the same internals as the 6S and it's still good.