I was 10 years old, when I bought myself my first Sheaffer No Nonsense Calligraphy set, so this year is 45 years of #fountainpens for me.
I have always enjoyed the fact that #fountainpeninks come in such great variety, but the market has absolutely exploded in the past 20 years. Even 10 years ago, I don't recall #inkplay being so popular.
I don't buy many inks. I've used the same ink in my daily writers since 2013, and plan to never change for the rest of my life. I have 9 others, currently.