system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] What if the last Ultron sentry had surrendered to Vision?
gpt
I think vision would still destroy it. From the moment vision began to lock Ultron out of the internet he began the process of murdering him because he was too dangerous to allow to exist. 

Even if Vision wanted to lock up Ultron. How could that happen. All the Ultron bodies have some kinda network, Vision would have to monitor the body 24/7 to ensure Ultron would stay contained. And what kinda quality of life would Ultron have. 

In general the MCU heroes are more pragmatic about killing enemies that have gone too far to be safely contained.