I was thinking about it for so long, imagine how cool is that to "type" at a whopping 250-300WPM (1250-1500CPM), that's how I see a true hacker would type. Of course it doesn't matter that much for programming, because you think and go around the code more than you actually type, but for any other kinds of text input Steno is a very attractive skill in my opinion.
I will try to learn stenotyping (with plover), and will keep a diary in this thread to make myself accountable, at least more than I would be at my own. If you have an ortholiniar keyboard (preferably something like Planck) you can join me for more fun and motivation. I don't think regular staggered qwerty with a single space bar will be comfortable to stenotype, but you can try it anyway.
Since I always have problems with motivation and persistence, I decided not to rush with this one, to not burnout. I think I can manage comfortable 30 minutes of practice a day, minus weekends, and I give myself a whole year to learn it to at least my regular typing speed of ~80WPM. Wish me luck.

Some good videos, you can check:

Co-creator of Plover gives a presentation, it's old but that's where it started:
https://www.youtube.com/watch?v=Wpv-Qb-dB6g
Another good presentation:
https://www.youtube.com/watch?v=CRXiNMS9JuY
Typing example (on staggered keyboard):
https://www.youtube.com/watch?v=KZGuBV1xe64
Real time on steno machine:
https://www.youtube.com/watch?v=YpJ4NP6O9pw