[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.)