Yeah, not convinced. Yet another youtube video where someone had to first build and try to memorize their custom dictionary preloaded with the specific words they are going to use to write the program they have in their head...

At least this one actually seems to remember their inputs well enough, I wonder how many times they practiced? I've seen similar videos before and it is hilarious to watch when they're trying to recall the chords they programmed.

I don't see this scaling for real projects with thousands and thousands of complicated identifiers, camelcase, crazy abbreviatin, acronyms, etc. Each project is going to have its own set of identifiers and you're going to need a custom dictionary for each of them.

Steno is great for natural languages that evolve very slowly over time and which can be largely learnt once and then used forever. Code is a rather different beast.