There's a good podcast episode from John Mcwhorter on this "So" phenomenon. [0] TL;DL It has some interesting applications (including functioning as a discourse marker), and isn't going away anytime soon.
[0]: https://slate.com/human-interest/2018/10/john-mcwhorter-on-s...
Just to emphasise this the more clearly: I’m talking about facts of life here, not ideals.
> So it’s often worth at least contemplating such feedback, if you care about being taken seriously.
(Maybe you were intending to joke here, but it still came off as “pretty natural.”)
What was unnatural about the original use? English isn't exactly standardized, there are plenty of dialects in which "so" is a common way to start a sentence. It might not be part of what you perceive as the prestige[1] dialect, but it's still natural.
[1]: https://en.wikipedia.org/wiki/Prestige_(sociolinguistics)
Engineers (at least in my locality in California) tend to prefer direct, casual language and to a great degree even have a grudge against overuse of formal language and formalities. We love things that speak to us in our day to day language.
I suppose if you're pitching a product to lawyers, then sure, bring on the notwithstanding hitherto aforementioned gibberish and I'm sure they'll feel right at home thereinafter. :)
So, it's interesting it goes that far back.
Update: the language log says it goes back before the 1850s. With an early peak around 1870.
"Where did you go to lunch?"
"So, we headed downtown..."
I think it's aggravating because it feels evasive, as if the person is pretending they're not answering a question and are instead just starting a new story.
However, I agree that it is out of place in a demonstration video since people are looking for the info in the first place and already know what's coming.
Would you mind sharing where you're from so I know which region I should be careful to not offend people by speaking like this?