The iOS app has never been free and that's the way most people use it these days. Desktop computing is a niche.
In America perhaps. Android is more popular in other countries, most people I know use Anki for free. The desktop app and sync are useful for editing cards and managing a large collection. Both of those are free too, but for how long?
This may be true, but as someone who picked up Anki as a desktop app back around 2009 it feels a little crazy.
I also can’t imagine making cards on a phone, given how much switching between apps/windows is involved and how poor mobile platforms are at multitasking. It’s difficult to envision it being anything but maddening.