E.g. in 2000 I might have cared about what's going to happen in 2100.
Now, in 2025, as I got older, my time horizon has shrunk down to maybe 10 years at most, but typically ~3 years, as my life experience has taught me that life is often unpredictable, sometimes too short, and age has that ability to temper our expectations through health issues and other things.
I also don't have the executive function anymore to think about long-term abstract things, since it is primarily occupied with my shorter-term responsibilities.
So yeah, I really don't give a shit what 2125 will look like. I don't have the arrogance in me to even make an educated guess, because 99.9% chance it will look different than what I imagine.
AI war machines apocalypse - War machines that consume earth's sources to build drones and other war machines. There are autonomous supply chain of these to the war front, all managed by the AI.
They're unhackable, with the newest encryption that would take years to decrypt. Unfortunately, there is a bug in the production code that causes the AI to start targeting everything. AI starts killing all humans instead of the filters it was given.
How do you defeat an autonomous self-replenishing robot army that consumes the earth for energy and grows in size each day? You can't.