It’s a distinction I remember from (American) childhood (I’m ~40) but I think even then it was viewed as pedantic and falling out of common usage. I don’t think either is “right” even if I take a prescriptivist approach, but even if I’m not aware of it I do tend to favor omitting non-decimal “and” in my own usage in hope it’s less ambiguous.

just because you haven't heard of something doesn't mean it doesn't exist.

I think it dates from the time when the only decimals the average person would use were in currency.

And just because it exists, doesn't mean it's "right".

Your link is the only one I could find on the first page of google that states "and" means decimal point. Every other source I could find says "100.17" is either "one hundred point one seven" or "one hundred point seventeen".