It's a shame because soixante-dix, quatre-vingt and quatre-vingt-dix are confusing to write (I probably made a mistake somewhere).
Sorry for the mistake (I did check on wikipedia before adding Canada do the list but got it wrong).
> the awareness in Quebec just isn't high enough to hope for a switch.
Same in France. I believe most of us regard "septante/octante/nonante" as amusing and exotic sounding. Sadly, I've never heard anyone advocating for a switch.
EDIT: Actually now that I dug up a bit more stuff it does seem like "huitante" is the one? Maybe I am just remembering wrong, feel free to ignore my ramblings.
But only 90 and 97-99 have "quatre vignt dix". 91-96 are written as "four-twenty-eleven" through "four-twenty-sixteen".
So you can't really avoid the complexity, because only half of the numbers in the 90s have '''90''' as part of the word.
As others said, French speakers parse "four-twenty-ten" as ninety. Nobody thinks about this in term of 4 * 20 + 10. Although, I remember that it confused me a little bit when I learned how to count.
That being said, I'd be in favour to switch to the Swiss/Belgian/Canadian way and replace "quatre vingt dix" by "nonante".