Twitchiness is your friend.
Nostalgia is a powerful thing. As AI robots became common towards the end of the human reign, it was inevitable that some creators would turn to kinder, simpler times for inspirations - regardless of whether bots made in the image of the past would find a place in the shiny, new future.
No one is sure what STEVe’s current function is, but somehow he continues to propagate millions of years into the future. His iconic design simply refuses to fade into darkness.