Our comments don't really contradict each other. The page size without any linked documents like an external style sheet grew to 140KB after your comment. But just the text is 30KB.

I use it around the house to Airplay music to various devices.

A number of things don't work, or work in unexpected ways, mostly because Apple doesn't allow me to log in to iCloud with such an old phone.

I can't control lights with the Home app. But Airplay works fine. The phone doesn't know what a HomePod is, but it shows up with a regular generic speaker icon, like the AirMac I have hooked up to my stereo.

Sometimes I have a few minutes to kill, and I pick it up to look at HN. The New York Times web site starts to work, but the login page doesn't load at all. WSJ blocks me at a "verifying the device" screen. WaPo half works. eBay works some, but no pictures. Ditto for Wikipedia.

There's a lot of things you take for granted on a new phone that you only realize when you're using an old phone. Like you didn't used to be able to quickly scroll an entire web page it's only a screen at a time in iOS 10. You can't grab the scroll bar on the side and move it, either.

And 99.9999% of people don't realize the genius of the camera island. It makes it so much easier to pick up the phone if one end is elevated a bit. With a completely flat phone, you end up dragging/scraping it along the table in order to grip it, which scuffs the surface. And if the table is really smooth, it's surprisingly difficult to lift the phone straight up.