I just remember someone once telling me they'd used insulin (not every day like they do now) but for a carb-load for the stage (do people even still do that? LOL) and he had a bag full of baby food - maybe it was unrelated
Re: salt, I remember an article by Laura Binetti and her partner where they swore by the inclusion of high-sodium pickles in their diets, so maybe they were early adopters
And I was certainly surprised by the fact that Milos put so much on his 'every day for 40 years' breakfast in that video posted a few days ago about his Mother's basement
That and the fact that I think he referred to it as 'Himalayan Sea Salt' 
Yeah the baby food for use with insulin probably came later since insulin use was way rare before Milos. Maybe some figured it would be easily digestible or whatever. There are some silly trends like Chad's pie filling, as if it would be anything special. Carbs are carbs and sugar is sugar pretty much.
I remember Scott Abel and the pickles. I think Milos and Efferding are right about the sodium, it's not something you need to restrict too much.
Himalayan sea salt Lol. That's another silly trend, people think there's something extra special about it, but from what I remember it only contains tiny traces of different trace minerals.