Being active is great but fat is still dangerous. Let's not lie to ourselves.
> decided that I wanted to err on the side of overeating
The reason you bonk is because you've run out of sugar in your muscles not fat
True, but sugar can be converted to fat in the body. If you eat too much sugar before/during a ride, the extra sugar becomes fat.
I figured that the way I adapted out of bonking was that my liver stored more glycogen. It's just a wild guess though.