[Across the Spider-Verse] Miles Morales really is breaking the canon, but it's not like Miguel thinks.

So... I've been thinking. First of all, I think Miguel is insane, batshit, unhinged, and everyone seems to look over it or brush it off.

Second of all, in the first movie, after Miles got bit by the spider, and when Kingpin turned on the reactor, things started going weirdly. Like, his Peter Parker dying really wasn't supposed to happen.

But, as I understand from Miguel's explanation, the "canon events" are episodes that happen to every Spiderman and "makes them who they are"; alas, I don't believe in destiny. I believe in the butterfly effect, chain reactions, dominoes falling until a wall is down. Miles doesn't believe in predetermination either, he wants to have a choice.

In the first movie, it's small things - the Rubik's cube Noir takes back to his dimension, Peter Pork getting serious for a moment, Gwen seems to come into the acceptance stage of her grief, Peter getting back with Mary Jane - all things that happened because of Kingpin and his reactor, of course, but also indirectly influenced by Miles, the spiderman who was never "meant to be".

Also, obviously, there was the creation of Spot. Miles's spot seems to be the first ever Spot (in the movie), there's never been a spot, and he wants to be a nemesis. And since Miles was the one who threw the bagel, through a butterfly effect he created the eldritch horror that Spot is by the end of the movie.

Right after Miles saves captain Singh, Pav seems to immediately have another important event - he accidentally reveals his identity to Gayatri. Peter B. has a daughter - because of Miles, according to himself. To me these seem to be "canon events." (and the black hole in Pav's world was caused by the Spot, not by the canon breaking, please, we've been over this. Alright, agree to disagree).
I don't believe Miles will be able to have his cake and eat it too, though. (Which is a theme in the movie, teehee, got it?). I believe he might try and succeed to save his dad, then lose his mom. Her last talk with him kinda sounded like goodbye. :(

In conclusion, canon breaking doesn't have the devastating consequences Miguel is gaslighting everyone into thinking it has, it just creates an uncertain future, that hasn't been written yet. We don't know what could happen, but that's not entirely bad.

Disclaimer that I've never touched a comic, but I'm pretty sure the movies are standalone.