Old iPhones become faster if you change the region to France
Some people are pretending that it is a user feature to throttle and that it is to have a more stable phone when the battery becomes older.But, if my memory is good, when Apple was fined in France, it was shown that the throttling was performed without consideration for the battery state. So was done even with a new battery (or the power cord plugged)Also, for people having Stockholm syndrome, if they would have to throttle to preserve stability when the battery is old, it is not a "nice" user feature but a consequence of having made the battery not removable and easily swappable!