We used to have earbuds that don't need to be charged because they had a headphone jack, didn't get lost so easily because they had a cord attached to a headphone jack, never lost the bluetooth connection because they had a headphone jack, and they cost less because they had a headphone jack. https://bsky.app/profile/daisyfm.bsky.social/post/3l3mfjc6sn62k
We used to have transportation that didn't need gas because horse, and didn't need expensive roads because horse, and never needed an oil change becuase horse, and they cost less because horse.
Assuming that they also scaled equally, horses have their own emissions which would cause just as many problems.
And not in the "fart smelly" way. Methane production from animal forms is a huge contributor to green house gasses. Now imagine every house has a horse.