As is, one can only hope. Until a source of animal-like protein can be perfected and become cheap enough for sustained consumption by a lower class individual, some people (more than you realize) will not be able to get off animal proteins due to various medical conditions. I suppose accessible cures for these conditions would be a proper solution as well.
I’m not even going to touch on the luxury of choosing your next meal here, since that’s been addressed already.
I haven’t finished going through all of it yet, but it seems pretty extensive and inclusive. This is great!