While my career has found a balance between impact and financial sustainability, I have a special place in my heart for projects that are otherwise unnecessary but happen just because it brings the creator joy.
While my career has found a balance between impact and financial sustainability, I have a special place in my heart for projects that are otherwise unnecessary but happen just because it brings the creator joy.
You classifications are good but it's a bit simplistic. Generally across the spectrum people is looking for breakthrough (e.g. deep learning) and/or game changing (e.g. transformer) contributions regardless if you're in academia, industry, non-profit, government labs, etc. But for pure joy, it can be from any simple creative projects as you've mentioned or it can be giving up seats for the elderly in a crowded metro trains.
Profit doesn't inherently mean you've made the median experience of individual humans better, and is just as often to effect significant degradation. My biz was slightly on the positive, but I could have pegged an extra zero in profit if I had forgone scruples.