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The phone doesn’t care about the brick. It only cares about one end of the cable. All your old USB-A <-> lightning cables still work with their USB-A bricks.

It is my understanding that what you describe is not how charging works nowadays. For example, the new 15W MagSafe charger doesn't work at 15W if you plug it into any old brick. A particular charging profile (voltage and current) must be negotiated between and supported by both the charger and the device.

Every single brick I have had on an android phone for the last 10 years work on the iphone. The last 5 years of phones my family has got have come with usb C bricks too.

What?

Any charger outputting to a Lightning cable still works. It's just not the optimal/fastest experience.

Sure. They are just fine. We just have too many of them. Everybody uses either RAVPower adapter or iPad chargers.

GP comment said (emphasis mine)

> While people do have a million chargers lying around from over the years, almost none of them will work with the new iPhone