system
Given the following post, respond as if you're commenting on Reddit:
human
[Spider-Man 2099]How far reaching was Miguel's mutation, were there other changes in his body besides the ones we know about, and why didn't he mutate any further like Seth Brundle in "The Fly"

And what was actually happening with and in his body during the mutation and
how much of the original human was left after it?
gpt
Remember that all versions of Spider-Man, or any other Spider-Person, are avatars of the Great Web of Life. While the individual may experience becoming a Totem as an accident (bitten by a spider, get your DNA re-written), they were chosen to serve as an avatar.  So, Miguel did not continue to mutate because his mutation was controlled by a Spider-Totem. 

As to how much of him remains human, it's a 50-50 split between human and spider.