It's like the dude who monkey-patches their car and goes to the dealer to complain why the suspension is stiff.

It's because you put 2by4's in place of the shocks, you absolute muppet. And then they either give them a massive bill to fix it properly or politely show them out.

Same will happen in self-modifying software. Some people are self-aware enough to know that "I made this, it's my problem to fix", some will complain to the maker of the harness they used and will be summarily shown the door.

I don’t want to be the one who has to upgrade this software + vibe coded patches.

It’s going to be very likely that once something is patched is to be considered as diverged and very hard to upgrade

... made minutes ago.