[ogurechny]

Those who learned to write with dip pens blame the ballpoint pens. However, people who actually use dip pens say that mass-made ones were not that good at helping you write better.

There is also another interesting question of how complex writing exercises set the manner to express one's thoughts both orally and on paper.

[Symbiote]

You have missed fountain pens. I found I wrote better when I used one, but it was compulsory at school until I was about 14. At that point, I immediately switched to a ball point pen, mostly to rebel and feel older.

I switched back once I was more mature.

Dip pens were obsoleted in the late 19th century.

[ogurechny]

I am a bit skeptical about millions and millions of kids all across the world having fountain pens.

[Symbiote]

It's up to each school, but it's common in the UK.

Note all the "back to school" offers, and the cheap £4 pen.

https://www.whsmith.co.uk/stationery/pens/fountain-pens/sta0...

(The same might apply in India, in which case there are literally millions of children with fountain pens.)