The UI for smartphones was also designed for the lowest common denominator. It’s so intuitive that we laughed at my toddler as she tried to swipe on a physical picture frame to see the next photo.
I would imagine it would be much harder to adapt to T9 input. My boomer parent stubbornly refused to adopt cell phones early on and that mindset crippled them as the world pivoted to apps and touchscreens.
Even I, who spent 10 years using T9 at a very speedy clip on a daily basis, has trouble with T9 now when I occasionally have to use it. We forget how tricky some of these things actually were until we got used to them.
I would imagine it would be much harder to adapt to T9 input. My boomer parent stubbornly refused to adopt cell phones early on and that mindset crippled them as the world pivoted to apps and touchscreens.