Realistically this is only going to affect people on mobile devices, which looks like it'd bring that down to about 6.5%

With over 1.5 billion active users... 6.5% is still a very large number of people!

Also.. not sure what safari/iOS did in their early years with keyboard password entry capitalization... but if they did auto capitalize... since Apple is so good at saving profile info across new installs/os updates... I imagine there would be a large portion of old apple users with perma-capitalized passwords out there as well.

iOS has never auto-capitalized type=“password”. It’s absolutely bonkers to me to imagine any mobile browser ever doing that, I was assuming some websites were reimplementing password fields badly with type=“text”.