One side effect not discussed here: how the shift to ballpoint pens increased hand strain [0]. Writing with a fountain pen is relatively effortless - not to deny it has several other drawbacks. I imagine this is part of why, as an elementary school student in France, I was required to write with only fountain pens. [0] https://www.theatlantic.com/technology/archive/2015/08/ballp...
I always use roller/gel pens, but I have never tried a fountain pen. I cannot use a cheap stick ballpoint pen. My writing looks bad, my hand cramps up, I don’t know why that is.
Most of my favorite pens at the moment are uniball, or take the same refill size and I’ve converted them. Somewhere I have a collapsing fountain pen but I had to be careful of the type of paper and I let it dry up at some point, got it working again, and forgot about it because I found another collapsing pen I could shoehorn the uniball gel into (by swapping the spring)