Big fan of this. I feel the next step is going to be to require OS support for a set amount of time. Affordable changing the battery won’t help when the device can’t run any software.
Okay, so Apple still has some time to think about the design of a phone with a replaceable battery because they haven't released one yet.
The main reason batteries couldn't be replaced in newer phones is because that made designers of the internals not care about the battery's shape, which meant they could insert more good tech inside. The battery normally had to be rectangular for easy insertion/removal. Even though this was the real main intent, manufacturers started capitalizing on this.