FWIW, I actually enjoyed T3 and what it did with the timeline. Not saying it’s a better movie, or it was necessary, but still I liked it well enough.

Basically, the arm and chip Dyson used to advance science merely accelerated judgement day. It was coming regardless. Destroying them just pushed judgment day back to its original date.

I kinda like that, cuz otherwise it’s a bootstrap paradox where skynet sent back the technology that was used to create skynet.